136539225 has 81 divisors (see below), whose sum is σ = 264554589. Its totient is φ = 67305600.

The previous prime is 136539211. The next prime is 136539229. The reversal of 136539225 is 522935631.

The square root of 136539225 is 11685.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 57471561 + 79067664 = 7581^2 + 8892^2 .

It is not a de Polignac number, because 136539225 - 2¹⁵ = 136506457 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 136539225.

It is not an unprimeable number, because it can be changed into a prime (136539229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3330205 + ... + 3330245.

Almost surely, 2^136539225 is an apocalyptic number.

136539225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136539225 is the 11685-th square number.

136539225 is the 5843-rd centered octagonal number.

It is an amenable number.

136539225 is a deficient number, since it is larger than the sum of its proper divisors (128015364).

136539225 is a wasteful number, since it uses less digits than its factorization.

136539225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 68 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The cubic root of 136539225 is about 514.9350783780.

Multiplying 136539225 by its sum of digits (36), we get a square (4915412100 = 70110²).

The spelling of 136539225 in words is "one hundred thirty-six million, five hundred thirty-nine thousand, two hundred twenty-five".