45139520 has 28 divisors (see below), whose sum is σ = 107489244. Its totient is φ = 18055680.

The previous prime is 45139499. The next prime is 45139529. The reversal of 45139520 is 2593154.

It can be written as a sum of positive squares in 2 ways, for example, as 28558336 + 16581184 = 5344^2 + 4072^2 .

It is not an unprimeable number, because it can be changed into a prime (45139529) 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, 70211 + ... + 70850.

Almost surely, 2^45139520 is an apocalyptic number.

45139520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45139520 is an abundant number, since it is smaller than the sum of its proper divisors (62349724).

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

45139520 is a wasteful number, since it uses less digits than its factorization.

45139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141078 (or 141068 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 45139520 is about 6718.5950912375. The cubic root of 45139520 is about 356.0565495321.

The spelling of 45139520 in words is "forty-five million, one hundred thirty-nine thousand, five hundred twenty".