Properties of the Number 7144

Seven Thousand One Hundred Forty-Four

Basics

Value: 7143 → 7144 → 7145

Parity: even

Prime: No

Previous Prime: 7129

Next Prime: 7151

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 19 × 47

Divisors: 1, 2, 4, 8, 19, 38, 47, 76, 94, 152

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111101000

Octal: 15750

Duodecimal: 4174

Hexadecimal: 1be8

Square: 51036736

Square Root: 84.52218643646175

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

a(n) = ∑_j=0..n ∑_k=0..j A026615(j, k). A26624

T(n,k) = Number of (n+2) X (k+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 1 2 4 6 or 7. A252558

a(n) = (5·n-7)*(n-1). A147874

Positive numbers whose product of digits is 7 times their sum. A62384

T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4. A241054

Zero, together with positive numbers k such that prime(k) - k is a square. A64370

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero. A297915

Expansion of e.g.f. ∑_k>=1 (exp(x) - 1)^k / (k * (1 - (exp(x) - 1)^k)). A330353

Antidiagonal sums of A086272 (and of A086273). A86274

Real part of absolute Gaussian perfect numbers, in order of increasing magnitude. A102531