400001124 has 12 divisors (see below), whose sum is σ = 933335984. Its totient is φ = 133333704.

The previous prime is 400001113. The next prime is 400001137. The reversal of 400001124 is 421100004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 33333427 = 400001124 / (4 + 0 + 0 + 0 + 0 + 1 + 1 + 2 + 4).

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, 16666702 + ... + 16666725.

Almost surely, 2^400001124 is an apocalyptic number.

It is an amenable number.

400001124 is an abundant number, since it is smaller than the sum of its proper divisors (533334860).

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

400001124 is a wasteful number, since it uses less digits than its factorization.

400001124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333434 (or 33333432 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 400001124 is about 20000.0280999803. The cubic root of 400001124 is about 736.8069898693.

Adding to 400001124 its reverse (421100004), we get a palindrome (821101128).

The spelling of 400001124 in words is "four hundred million, one thousand, one hundred twenty-four".