256629 has 8 divisors (see below), whose sum is σ = 345312. Its totient is φ = 169520.

The previous prime is 256609. The next prime is 256639. The reversal of 256629 is 926652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256629 - 2⁹ = 256117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256596 and 256605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67 + ... + 719.

It is an arithmetic number, because the mean of its divisors is an integer number (43164).

2²⁵⁶⁶²⁹ is an apocalyptic number.

It is an amenable number.

256629 is a deficient number, since it is larger than the sum of its proper divisors (88683).

256629 is a wasteful number, since it uses less digits than its factorization.

256629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 6480, while the sum is 30.

The square root of 256629 is about 506.5856294843. The cubic root of 256629 is about 63.5480034649.

The spelling of 256629 in words is "two hundred fifty-six thousand, six hundred twenty-nine".