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256974 = 2342829

256974 has 8 divisors (see below), whose sum is σ = 513960. Its totient is φ = 85656.

The previous prime is 256967. The next prime is 256981. The reversal of 256974 is 479652.

It is an interprime number because it is at equal distance from previous prime (256967) and next prime (256981).

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

256974 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256974.

It is an unprimeable number.

256974 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21409 + ... + 21420.

It is an arithmetic number, because the mean of its divisors is an integer number (64245).

2256974 is an apocalyptic number.

256974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256974 is a wasteful number, since it uses less digits than its factorization.

256974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42834.

The product of its digits is 15120, while the sum is 33.

The square root of 256974 is about 506.9260301070. The cubic root of 256974 is about 63.5764676992.

The spelling of 256974 in words is "two hundred fifty-six thousand, nine hundred seventy-four".

Divisors: 1 2 3 6 42829 85658 128487 256974