139564225 has 6 divisors (see below), whose sum is σ = 173059670. Its totient is φ = 111651360.

The previous prime is 139564223. The next prime is 139564231. The reversal of 139564225 is 522465931.

It can be written as a sum of positive squares in 3 ways, for example, as 418609 + 139145616 = 647^2 + 11796^2 .

It is not a de Polignac number, because 139564225 - 2¹ = 139564223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139564223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2791260 + ... + 2791309.

Almost surely, 2^139564225 is an apocalyptic number.

It is an amenable number.

139564225 is a deficient number, since it is larger than the sum of its proper divisors (33495445).

139564225 is an equidigital number, since it uses as much as digits as its factorization.

139564225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582579 (or 5582574 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 139564225 is about 11813.7303592049. The cubic root of 139564225 is about 518.7100980582.

It can be divided in two parts, 13956 and 4225, that added together give a palindrome (18181).

The spelling of 139564225 in words is "one hundred thirty-nine million, five hundred sixty-four thousand, two hundred twenty-five".