136720525 has 6 divisors (see below), whose sum is σ = 169533482. Its totient is φ = 109376400.

The previous prime is 136720517. The next prime is 136720531. The reversal of 136720525 is 525027631.

It can be written as a sum of positive squares in 3 ways, for example, as 2090916 + 134629609 = 1446^2 + 11603^2 .

It is not a de Polignac number, because 136720525 - 2³ = 136720517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2734386 + ... + 2734435.

Almost surely, 2^136720525 is an apocalyptic number.

It is an amenable number.

136720525 is a deficient number, since it is larger than the sum of its proper divisors (32812957).

136720525 is an equidigital number, since it uses as much as digits as its factorization.

136720525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468831 (or 5468826 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 136720525 is about 11692.7552356149. The cubic root of 136720525 is about 515.1628918855.

The spelling of 136720525 in words is "one hundred thirty-six million, seven hundred twenty thousand, five hundred twenty-five".