45139420 has 24 divisors (see below), whose sum is σ = 100369584. Its totient is φ = 16993536.

The previous prime is 45139397. The next prime is 45139429. The reversal of 45139420 is 2493154.

45139420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45139429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66042 + ... + 66721.

It is an arithmetic number, because the mean of its divisors is an integer number (4182066).

Almost surely, 2^45139420 is an apocalyptic number.

It is an amenable number.

45139420 is an abundant number, since it is smaller than the sum of its proper divisors (55230164).

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

45139420 is a wasteful number, since it uses less digits than its factorization.

45139420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132789 (or 132787 counting only the distinct ones).

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

The square root of 45139420 is about 6718.5876492013. The cubic root of 45139420 is about 356.0562866016.

The spelling of 45139420 in words is "forty-five million, one hundred thirty-nine thousand, four hundred twenty".