400100042 has 16 divisors (see below), whose sum is σ = 626709312. Its totient is φ = 191209920.

The previous prime is 400100033. The next prime is 400100171. The reversal of 400100042 is 240001004.

It is a junction number, because it is equal to n+sod(n) for n = 400099996 and 400100032.

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, 85442 + ... + 90002.

It is an arithmetic number, because the mean of its divisors is an integer number (39169332).

Almost surely, 2^400100042 is an apocalyptic number.

400100042 is a deficient number, since it is larger than the sum of its proper divisors (226609270).

400100042 is a wasteful number, since it uses less digits than its factorization.

400100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6493.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 400100042 is about 20002.5008936383. The cubic root of 400100042 is about 736.8677209210.

Adding to 400100042 its reverse (240001004), we get a palindrome (640101046).

The spelling of 400100042 in words is "four hundred million, one hundred thousand, forty-two".