42599985 has 16 divisors (see below), whose sum is σ = 70511040. Its totient is φ = 21936320.

The previous prime is 42599981. The next prime is 42599989. The reversal of 42599985 is 58999524.

It is an interprime number because it is at equal distance from previous prime (42599981) and next prime (42599989).

It is not a de Polignac number, because 42599985 - 2² = 42599981 is a prime.

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, 48531 + ... + 49400.

It is an arithmetic number, because the mean of its divisors is an integer number (4406940).

Almost surely, 2^42599985 is an apocalyptic number.

It is an amenable number.

42599985 is a deficient number, since it is larger than the sum of its proper divisors (27911055).

42599985 is a wasteful number, since it uses less digits than its factorization.

42599985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97968.

The product of its digits is 1166400, while the sum is 51.

The square root of 42599985 is about 6526.8663997358. The cubic root of 42599985 is about 349.2500541007.

The spelling of 42599985 in words is "forty-two million, five hundred ninety-nine thousand, nine hundred eighty-five".