401556965 has 8 divisors (see below), whose sum is σ = 484561440. Its totient is φ = 319450192.

The previous prime is 401556959. The next prime is 401556971. The reversal of 401556965 is 569655104.

It is an interprime number because it is at equal distance from previous prime (401556959) and next prime (401556971).

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 401556965 - 2¹⁶ = 401491429 is a prime.

It is a super-2 number, since 2×401556965² = 322495992280022450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223439 + ... + 225228.

It is an arithmetic number, because the mean of its divisors is an integer number (60570180).

Almost surely, 2^401556965 is an apocalyptic number.

It is an amenable number.

401556965 is a deficient number, since it is larger than the sum of its proper divisors (83004475).

401556965 is a wasteful number, since it uses less digits than its factorization.

401556965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448851.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 401556965 is about 20038.8863213503. The cubic root of 401556965 is about 737.7610467248.

The spelling of 401556965 in words is "four hundred one million, five hundred fifty-six thousand, nine hundred sixty-five".