45621139 has 4 divisors (see below), whose sum is σ = 45730440. Its totient is φ = 45511840.

The previous prime is 45621127. The next prime is 45621179. The reversal of 45621139 is 93112654.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45621139 - 2⁷ = 45621011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45621139.

It is not an unprimeable number, because it can be changed into a prime (45621179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54022 + ... + 54859.

It is an arithmetic number, because the mean of its divisors is an integer number (11432610).

Almost surely, 2^45621139 is an apocalyptic number.

45621139 is a deficient number, since it is larger than the sum of its proper divisors (109301).

45621139 is a wasteful number, since it uses less digits than its factorization.

45621139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109300.

The product of its digits is 6480, while the sum is 31.

The square root of 45621139 is about 6754.3422329639. The cubic root of 45621139 is about 357.3183950565.

The spelling of 45621139 in words is "forty-five million, six hundred twenty-one thousand, one hundred thirty-nine".