42599999 has 12 divisors (see below), whose sum is σ = 46700136. Its totient is φ = 38836512.

The previous prime is 42599993. The next prime is 42600023. The reversal of 42599999 is 99999524.

It is not a de Polignac number, because 42599999 - 2¹⁶ = 42534463 is a prime.

It is a Duffinian number.

42599999 is a modest number, since divided by 9999 gives 4259 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42599993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12509 + ... + 15545.

It is an arithmetic number, because the mean of its divisors is an integer number (3891678).

Almost surely, 2^42599999 is an apocalyptic number.

42599999 is a deficient number, since it is larger than the sum of its proper divisors (4100137).

42599999 is a wasteful number, since it uses less digits than its factorization.

42599999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146 (or 3133 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 56.

The square root of 42599999 is about 6526.8674722259. The cubic root of 42599999 is about 349.2500923597.

The spelling of 42599999 in words is "forty-two million, five hundred ninety-nine thousand, nine hundred ninety-nine".