70442139 has 16 divisors (see below), whose sum is σ = 99351680. Its totient is φ = 44271360.

The previous prime is 70442111. The next prime is 70442149. The reversal of 70442139 is 93124407.

It is a happy number.

It is not a de Polignac number, because 70442139 - 2⁵ = 70442107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70442149) 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, 9099 + ... + 14955.

It is an arithmetic number, because the mean of its divisors is an integer number (6209480).

Almost surely, 2^70442139 is an apocalyptic number.

70442139 is a deficient number, since it is larger than the sum of its proper divisors (28909541).

70442139 is a wasteful number, since it uses less digits than its factorization.

70442139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 70442139 is about 8392.9815322089. The cubic root of 70442139 is about 412.9944146970.

The spelling of 70442139 in words is "seventy million, four hundred forty-two thousand, one hundred thirty-nine".