Properties of the Number 1604

One Thousand Six Hundred Four

Basics

Value: 1603 → 1604 → 1605

Parity: even

Prime: No

Previous Prime: 1601

Next Prime: 1607

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 401

Divisors: 1, 2, 4, 401, 802, 1604

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001000100

Octal: 3104

Duodecimal: B18

Hexadecimal: 644

Square: 2572816

Square Root: 40.049968789001575

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

Number of compositions of n into prime parts. A23360

a(n) = n² + 4. A87475

Numbers m such that the factorizations of m..m+2 have the same number of primes (including multiplicities). A45939

Partial sums of the squarefree numbers, A005117. A173143

Number of partitions of n such that smaller parts do not occur more frequently than greater parts. A171979

a(n) = A003146(A003146(n)). A319972

T(n,k)=Number of length n 1..(k+1) arrays with every leading partial sum divisible by 2, 3 or 5. A254827

Numbers such that the arithmetic mean of the cubes of their prime factors (taken with multiplicity) is a prime. A134619

Numbers whose product of prime exponents equals the product of prime shadows of its prime indices. A353399

Sequence Sa of the eight sequences defining the blocks of terms in A377091. A379788