42217904 has 20 divisors (see below), whose sum is σ = 82123464. Its totient is φ = 21024768.

The previous prime is 42217883. The next prime is 42217907. The reversal of 42217904 is 40971224.

It is not an unprimeable number, because it can be changed into a prime (42217907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022 + ... + 9245.

Almost surely, 2^42217904 is an apocalyptic number.

It is an amenable number.

42217904 is a deficient number, since it is larger than the sum of its proper divisors (39905560).

42217904 is a wasteful number, since it uses less digits than its factorization.

42217904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532 (or 10526 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 42217904 is about 6497.5306078540. The cubic root of 42217904 is about 348.2027708046.

The spelling of 42217904 in words is "forty-two million, two hundred seventeen thousand, nine hundred four".