42989865 has 16 divisors (see below), whose sum is σ = 68904000. Its totient is φ = 22887872.

The previous prime is 42989857. The next prime is 42989873. The reversal of 42989865 is 56898924.

It is an interprime number because it is at equal distance from previous prime (42989857) and next prime (42989873).

It is a cyclic number.

It is not a de Polignac number, because 42989865 - 2³ = 42989857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7711 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (4306500).

Almost surely, 2^42989865 is an apocalyptic number.

It is an amenable number.

42989865 is a deficient number, since it is larger than the sum of its proper divisors (25914135).

42989865 is a wasteful number, since it uses less digits than its factorization.

42989865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016.

The product of its digits is 1244160, while the sum is 51.

The square root of 42989865 is about 6556.6656922555. The cubic root of 42989865 is about 350.3122791167.

The spelling of 42989865 in words is "forty-two million, nine hundred eighty-nine thousand, eight hundred sixty-five".