956921 has 12 divisors (see below), whose sum is σ = 1135440. Its totient is φ = 803880.

The previous prime is 956909. The next prime is 956929. The reversal of 956921 is 129659.

It is a de Polignac number, because none of the positive numbers 2^k-956921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (956929) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2726 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (94620).

2⁹⁵⁶⁹²¹ is an apocalyptic number.

It is an amenable number.

956921 is a deficient number, since it is larger than the sum of its proper divisors (178519).

956921 is a wasteful number, since it uses less digits than its factorization.

956921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 397 counting only the distinct ones).

The product of its digits is 4860, while the sum is 32.

The square root of 956921 is about 978.2233896202. The cubic root of 956921 is about 98.5429052006.

The spelling of 956921 in words is "nine hundred fifty-six thousand, nine hundred twenty-one".