400521054 has 48 divisors (see below), whose sum is σ = 878501376. Its totient is φ = 121584000.

The previous prime is 400521029. The next prime is 400521061. The reversal of 400521054 is 450125004.

It is a super-2 number, since 2×400521054² = 320834229394541832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400521054.

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, 50029 + ... + 57479.

It is an arithmetic number, because the mean of its divisors is an integer number (18302112).

Almost surely, 2^400521054 is an apocalyptic number.

400521054 is an abundant number, since it is smaller than the sum of its proper divisors (477980322).

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

400521054 is a wasteful number, since it uses less digits than its factorization.

400521054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7521 (or 7504 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 400521054 is about 20013.0221106159. The cubic root of 400521054 is about 737.1260908026.

Adding to 400521054 its reverse (450125004), we get a palindrome (850646058).

The spelling of 400521054 in words is "four hundred million, five hundred twenty-one thousand, fifty-four".