400120124 has 12 divisors (see below), whose sum is σ = 702219000. Its totient is φ = 199486128.

The previous prime is 400120103. The next prime is 400120139. The reversal of 400120124 is 421021004.

It is a super-2 number, since 2×400120124² = 320192227259550752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400120099 and 400120108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141914 + ... + 144705.

It is an arithmetic number, because the mean of its divisors is an integer number (58518250).

Almost surely, 2^400120124 is an apocalyptic number.

It is an amenable number.

400120124 is a deficient number, since it is larger than the sum of its proper divisors (302098876).

400120124 is a wasteful number, since it uses less digits than its factorization.

400120124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286972 (or 286970 counting only the distinct ones).

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

The square root of 400120124 is about 20003.0028745686. The cubic root of 400120124 is about 736.8800491126.

Adding to 400120124 its reverse (421021004), we get a palindrome (821141128).

The spelling of 400120124 in words is "four hundred million, one hundred twenty thousand, one hundred twenty-four".