45139812 has 24 divisors (see below), whose sum is σ = 106811712. Its totient is φ = 14834400.

The previous prime is 45139781. The next prime is 45139819. The reversal of 45139812 is 21893154.

45139812 = T₈ + T₉ + ... + T₆₄₆.

It is not an unprimeable number, because it can be changed into a prime (45139819) 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, 25639 + ... + 27342.

It is an arithmetic number, because the mean of its divisors is an integer number (4450488).

Almost surely, 2^45139812 is an apocalyptic number.

It is an amenable number.

45139812 is an abundant number, since it is smaller than the sum of its proper divisors (61671900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45139812 is a wasteful number, since it uses less digits than its factorization.

45139812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53059 (or 53057 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 45139812 is about 6718.6168219359. The cubic root of 45139812 is about 356.0573172872.

The spelling of 45139812 in words is "forty-five million, one hundred thirty-nine thousand, eight hundred twelve".