401517945 has 32 divisors (see below), whose sum is σ = 729008640. Its totient is φ = 209583360.

The previous prime is 401517889. The next prime is 401517953. The reversal of 401517945 is 549715104.

It is not a de Polignac number, because 401517945 - 2⁶ = 401517881 is a prime.

It is a super-2 number, since 2×401517945² = 322433320314046050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25296 + ... + 37985.

It is an arithmetic number, because the mean of its divisors is an integer number (22781520).

Almost surely, 2^401517945 is an apocalyptic number.

401517945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401517945 is a deficient number, since it is larger than the sum of its proper divisors (327490695).

401517945 is a wasteful number, since it uses less digits than its factorization.

401517945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63342 (or 63336 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 401517945 is about 20037.9126906971. The cubic root of 401517945 is about 737.7371494358.

The spelling of 401517945 in words is "four hundred one million, five hundred seventeen thousand, nine hundred forty-five".