139321530 has 48 divisors (see below), whose sum is σ = 363195144. Its totient is φ = 37054080.

The previous prime is 139321519. The next prime is 139321531. The reversal of 139321530 is 35123931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86657481 + 52664049 = 9309^2 + 7257^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139321494 and 139321503.

It is not an unprimeable number, because it can be changed into a prime (139321531) 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 23 ways as a sum of consecutive naturals, for example, 36052 + ... + 39728.

Almost surely, 2^139321530 is an apocalyptic number.

139321530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139321530 is an abundant number, since it is smaller than the sum of its proper divisors (223873614).

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

139321530 is a wasteful number, since it uses less digits than its factorization.

139321530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111 (or 4108 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 139321530 is about 11803.4541554581. The cubic root of 139321530 is about 518.4092535571.

The spelling of 139321530 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, five hundred thirty".