136261253 has 2 divisors, whose sum is σ = 136261254. Its totient is φ = 136261252.

The previous prime is 136261249. The next prime is 136261259. The reversal of 136261253 is 352162631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134050084 + 2211169 = 11578^2 + 1487^2 .

It is a cyclic number.

It is not a de Polignac number, because 136261253 - 2² = 136261249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136261259) by changing a digit.

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 as a sum of consecutive naturals, namely, 68130626 + 68130627.

It is an arithmetic number, because the mean of its divisors is an integer number (68130627).

Almost surely, 2^136261253 is an apocalyptic number.

It is an amenable number.

136261253 is a deficient number, since it is larger than the sum of its proper divisors (1).

136261253 is an equidigital number, since it uses as much as digits as its factorization.

136261253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 136261253 is about 11673.0995455363. The cubic root of 136261253 is about 514.5853991834.

The spelling of 136261253 in words is "one hundred thirty-six million, two hundred sixty-one thousand, two hundred fifty-three".