137398225 has 6 divisors (see below), whose sum is σ = 170373830. Its totient is φ = 109918560.

The previous prime is 137398223. The next prime is 137398229. The reversal of 137398225 is 522893731.

It can be written as a sum of positive squares in 3 ways, for example, as 16384 + 137381841 = 128^2 + 11721^2 .

It is not a de Polignac number, because 137398225 - 2¹ = 137398223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137398223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2747940 + ... + 2747989.

Almost surely, 2^137398225 is an apocalyptic number.

It is an amenable number.

137398225 is a deficient number, since it is larger than the sum of its proper divisors (32975605).

137398225 is an equidigital number, since it uses as much as digits as its factorization.

137398225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495939 (or 5495934 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 137398225 is about 11721.6988956380. The cubic root of 137398225 is about 516.0126804668.

The spelling of 137398225 in words is "one hundred thirty-seven million, three hundred ninety-eight thousand, two hundred twenty-five".