139305402 has 12 divisors (see below), whose sum is σ = 301828410. Its totient is φ = 46435128.

The previous prime is 139305377. The next prime is 139305403. The reversal of 139305402 is 204503931.

It can be written as a sum of positive squares in only one way, i.e., 135699201 + 3606201 = 11649^2 + 1899^2 .

It is not an unprimeable number, because it can be changed into a prime (139305403) 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 5 ways as a sum of consecutive naturals, for example, 3869577 + ... + 3869612.

Almost surely, 2^139305402 is an apocalyptic number.

139305402 is an abundant number, since it is smaller than the sum of its proper divisors (162523008).

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

139305402 is a wasteful number, since it uses less digits than its factorization.

139305402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739197 (or 7739194 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 139305402 is about 11802.7709458415. The cubic root of 139305402 is about 518.3892489268.

The spelling of 139305402 in words is "one hundred thirty-nine million, three hundred five thousand, four hundred two".