42902139 has 16 divisors (see below), whose sum is σ = 65594880. Its totient is φ = 24432960.

The previous prime is 42902137. The next prime is 42902141. The reversal of 42902139 is 93120924.

It is an interprime number because it is at equal distance from previous prime (42902137) and next prime (42902141).

It is not a de Polignac number, because 42902139 - 2¹ = 42902137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42902137) 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, 3247 + ... + 9815.

It is an arithmetic number, because the mean of its divisors is an integer number (4099680).

Almost surely, 2^42902139 is an apocalyptic number.

42902139 is a deficient number, since it is larger than the sum of its proper divisors (22692741).

42902139 is a wasteful number, since it uses less digits than its factorization.

42902139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6890.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 42902139 is about 6549.9724426901. The cubic root of 42902139 is about 350.0738320432.

The spelling of 42902139 in words is "forty-two million, nine hundred two thousand, one hundred thirty-nine".