400001122 has 16 divisors (see below), whose sum is σ = 628607232. Its totient is φ = 190658160.

The previous prime is 400001113. The next prime is 400001137. The reversal of 400001122 is 221100004.

It is a junction number, because it is equal to n+sod(n) for n = 400001099 and 400001108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43993 + ... + 52300.

It is an arithmetic number, because the mean of its divisors is an integer number (39287952).

Almost surely, 2^400001122 is an apocalyptic number.

400001122 is a deficient number, since it is larger than the sum of its proper divisors (228606110).

400001122 is a wasteful number, since it uses less digits than its factorization.

400001122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96393.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 400001122 is about 20000.0280499803. The cubic root of 400001122 is about 736.8069886413.

Adding to 400001122 its reverse (221100004), we get a palindrome (621101126).

The spelling of 400001122 in words is "four hundred million, one thousand, one hundred twenty-two".