400542575 has 24 divisors (see below), whose sum is σ = 513249888. Its totient is φ = 309847680.

The previous prime is 400542551. The next prime is 400542613. The reversal of 400542575 is 575245004.

It is not a de Polignac number, because 400542575 - 2⁶ = 400542511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158774 + ... + 161276.

It is an arithmetic number, because the mean of its divisors is an integer number (21385412).

Almost surely, 2^400542575 is an apocalyptic number.

400542575 is a deficient number, since it is larger than the sum of its proper divisors (112707313).

400542575 is a wasteful number, since it uses less digits than its factorization.

400542575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 400542575 is about 20013.5597783103. The cubic root of 400542575 is about 737.1392931103.

Adding to 400542575 its reverse (575245004), we get a palindrome (975787579).

The spelling of 400542575 in words is "four hundred million, five hundred forty-two thousand, five hundred seventy-five".