139125530 has 16 divisors (see below), whose sum is σ = 255151944. Its totient is φ = 54600000.

The previous prime is 139125521. The next prime is 139125533. The reversal of 139125530 is 35521931.

It can be written as a sum of positive squares in 4 ways, for example, as 138744841 + 380689 = 11779^2 + 617^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139125493 and 139125502.

It is not an unprimeable number, because it can be changed into a prime (139125533) 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, 130721 + ... + 131780.

Almost surely, 2^139125530 is an apocalyptic number.

139125530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139125530 is a deficient number, since it is larger than the sum of its proper divisors (116026414).

139125530 is a wasteful number, since it uses less digits than its factorization.

139125530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262561.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 139125530 is about 11795.1485789709. The cubic root of 139125530 is about 518.1660370228.

The spelling of 139125530 in words is "one hundred thirty-nine million, one hundred twenty-five thousand, five hundred thirty".