136253405 has 8 divisors (see below), whose sum is σ = 165744312. Its totient is φ = 107509248.

The previous prime is 136253387. The next prime is 136253417. The reversal of 136253405 is 504352631.

It can be written as a sum of positive squares in 4 ways, for example, as 12020089 + 124233316 = 3467^2 + 11146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136253405 - 2²⁰ = 135204829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186284 + ... + 187013.

It is an arithmetic number, because the mean of its divisors is an integer number (20718039).

Almost surely, 2^136253405 is an apocalyptic number.

It is an amenable number.

136253405 is a deficient number, since it is larger than the sum of its proper divisors (29490907).

136253405 is an equidigital number, since it uses as much as digits as its factorization.

136253405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373375.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 136253405 is about 11672.7633831925. The cubic root of 136253405 is about 514.5755197700.

The spelling of 136253405 in words is "one hundred thirty-six million, two hundred fifty-three thousand, four hundred five".