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Properties of the Number 42420

Forty-Two Thousand Four Hundred Twenty

Basics

Value: 42419 → 42420 → 42421

Parity: even

Prime: No

Previous Prime: 42409

Next Prime: 42433

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 2 × 3 × 5 × 7 × 101

Divisors: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010110110100

Octal: 122664

Duodecimal: 20670

Hexadecimal: a5b4

Square: 1799456400

Square Root: 205.9611613872868

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors. A199149
Total number of parts coprime to n in the partitions of n into 10 parts. A363328
Start with 0. Successive digits in the sequence must differ by 2. Adjoin the smallest number not yet in the sequence. A228327
Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-10). A23440
Number of ordered triples (w,x,y) with all terms in {-n, ..., -1, 1, ..., n} and 5w + x + y > 0. A211630
a(n) = ∑i=1..n-1(in-2) mod n4. A284760
Triangle read by rows: T(n,k) is the number of face-connected polyhedral components consisting of k cuboctahedra and n-k octahedra in the rectified cubic honeycomb up to translation, rotation, and reflection of the honeycomb, 0<=k<=n. A384782
Bond series for first parallel moment of hexagonal net. A120542
Number of nX3 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors. A199144
Number of nX5 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors. A199146