400121024 has 28 divisors (see below), whose sum is σ = 799338000. Its totient is φ = 198713088.

The previous prime is 400121003. The next prime is 400121039. The reversal of 400121024 is 420121004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11444 + ... + 30515.

Almost surely, 2^400121024 is an apocalyptic number.

It is an amenable number.

400121024 is a deficient number, since it is larger than the sum of its proper divisors (399216976).

400121024 is a wasteful number, since it uses less digits than its factorization.

400121024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42120 (or 42110 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 400121024 is about 20003.0253711782. The cubic root of 400121024 is about 736.8806016063.

Adding to 400121024 its reverse (420121004), we get a palindrome (820242028).

The spelling of 400121024 in words is "four hundred million, one hundred twenty-one thousand, twenty-four".