42599986 has 32 divisors (see below), whose sum is σ = 75753216. Its totient is φ = 17859600.

The previous prime is 42599981. The next prime is 42599989. The reversal of 42599986 is 68999524.

It is not an unprimeable number, because it can be changed into a prime (42599981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33991 + ... + 35221.

It is an arithmetic number, because the mean of its divisors is an integer number (2367288).

Almost surely, 2^42599986 is an apocalyptic number.

42599986 is a deficient number, since it is larger than the sum of its proper divisors (33153230).

42599986 is a wasteful number, since it uses less digits than its factorization.

42599986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1257 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 52.

The square root of 42599986 is about 6526.8664763422. The cubic root of 42599986 is about 349.2500568334.

The spelling of 42599986 in words is "forty-two million, five hundred ninety-nine thousand, nine hundred eighty-six".