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Properties of the Number 6415

Six Thousand Four Hundred Fifteen

Basics

Value: 6414 → 6415 → 6416

Parity: odd

Prime: No

Previous Prime: 6397

Next Prime: 6421

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 1283

Divisors: 1, 5, 1283, 6415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100001111

Octal: 14417

Duodecimal: 3867

Hexadecimal: 190f

Square: 41152225

Square Root: 80.09369513263825

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

Composite squarefree numbers n such that p + τ(n) divides n - φ(n), where p are the prime factors of n, τ(n) = A000005(n) and φ(n) = A000010(n). A229324
a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2p+1 and p is the unique integer such that 2p < n - 1 <= 2p+1, starting with a(1) = 1 and a(2) = a(3) = 2. A49955
McKay-Thompson series of class 30F for the Monster group with a(0) = 1. A205977
Number of lattice points in the closed region bounded by the graphs of y = (5/6)*x2, x = n, and y = 0, excluding points on the x-axis. A227347
The number of partitions of n in which at least one part is a multiple of 4. A295342
Convolution of natural numbers >= 2 and natural numbers >= 3. A23545
McKay-Thompson series of class 30F for Monster. A58617
Let f(n) be 2n + POD(n) + 1 if n is even, otherwise 2n - POD(n) - 1, where POD(n) is the product of digits of n. Sequence gives smallest number requiring n iterations to reach a prime. A74808
a(1)=1, then a(n)=2·a(n-1) if a(n-1) is prime, a(n)=a(n-1)+1 otherwise. A80735
a(n) is the smallest term m in A173978 for which A020639(2m-3) = prime(n), n > 1. A173980