139235225 has 12 divisors (see below), whose sum is σ = 173074860. Its totient is φ = 111115200.

The previous prime is 139235203. The next prime is 139235231. The reversal of 139235225 is 522532931.

It can be written as a sum of positive squares in 6 ways, for example, as 2157961 + 137077264 = 1469^2 + 11708^2 .

It is not a de Polignac number, because 139235225 - 2⁸ = 139234969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139235191 and 139235200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3911 + ... + 17139.

It is an arithmetic number, because the mean of its divisors is an integer number (14422905).

Almost surely, 2^139235225 is an apocalyptic number.

It is an amenable number.

139235225 is a deficient number, since it is larger than the sum of its proper divisors (33839635).

139235225 is a wasteful number, since it uses less digits than its factorization.

139235225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13660 (or 13655 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 139235225 is about 11799.7976677569. The cubic root of 139235225 is about 518.3021857493.

The spelling of 139235225 in words is "one hundred thirty-nine million, two hundred thirty-five thousand, two hundred twenty-five".