45042139 has 8 divisors (see below), whose sum is σ = 45636480. Its totient is φ = 44451456.

The previous prime is 45042131. The next prime is 45042203. The reversal of 45042139 is 93124054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45042139 - 2³ = 45042131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45042131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30582 + ... + 32020.

It is an arithmetic number, because the mean of its divisors is an integer number (5704560).

Almost surely, 2^45042139 is an apocalyptic number.

45042139 is a deficient number, since it is larger than the sum of its proper divisors (594341).

45042139 is a wasteful number, since it uses less digits than its factorization.

45042139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 45042139 is about 6711.3440531685. The cubic root of 45042139 is about 355.8003209426.

The spelling of 45042139 in words is "forty-five million, forty-two thousand, one hundred thirty-nine".