42207904 has 12 divisors (see below), whose sum is σ = 83096874. Its totient is φ = 21103936.

The previous prime is 42207899. The next prime is 42207929. The reversal of 42207904 is 40970224.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 4410000 = 6148^2 + 2100^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659467 + ... + 659530.

Almost surely, 2^42207904 is an apocalyptic number.

It is an amenable number.

42207904 is a deficient number, since it is larger than the sum of its proper divisors (40888970).

42207904 is a wasteful number, since it uses less digits than its factorization.

42207904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319007 (or 1318999 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42207904 is about 6496.7610391641. The cubic root of 42207904 is about 348.1752761294.

The spelling of 42207904 in words is "forty-two million, two hundred seven thousand, nine hundred four".