139672530 has 24 divisors (see below), whose sum is σ = 363148812. Its totient is φ = 37245984.

The previous prime is 139672517. The next prime is 139672571. The reversal of 139672530 is 35276931.

139672530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 136819809 + 2852721 = 11697^2 + 1689^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775869 + ... + 776048.

Almost surely, 2^139672530 is an apocalyptic number.

139672530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139672530 is an abundant number, since it is smaller than the sum of its proper divisors (223476282).

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

139672530 is a wasteful number, since it uses less digits than its factorization.

139672530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551930 (or 1551927 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 139672530 is about 11818.3133314361. The cubic root of 139672530 is about 518.8442402937.

The spelling of 139672530 in words is "one hundred thirty-nine million, six hundred seventy-two thousand, five hundred thirty".