136525321 has 2 divisors, whose sum is σ = 136525322. Its totient is φ = 136525320.

The previous prime is 136525307. The next prime is 136525327. The reversal of 136525321 is 123525631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128572921 + 7952400 = 11339^2 + 2820^2 .

It is a cyclic number.

It is not a de Polignac number, because 136525321 - 2²⁷ = 2307593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136525321.

It is not a weakly prime, because it can be changed into another prime (136525327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68262660 + 68262661.

It is an arithmetic number, because the mean of its divisors is an integer number (68262661).

Almost surely, 2^136525321 is an apocalyptic number.

It is an amenable number.

136525321 is a deficient number, since it is larger than the sum of its proper divisors (1).

136525321 is an equidigital number, since it uses as much as digits as its factorization.

136525321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 136525321 is about 11684.4050340614. The cubic root of 136525321 is about 514.9175989067.

The spelling of 136525321 in words is "one hundred thirty-six million, five hundred twenty-five thousand, three hundred twenty-one".