136456253 has 4 divisors (see below), whose sum is σ = 136922268. Its totient is φ = 135990240.

The previous prime is 136456237. The next prime is 136456277. The reversal of 136456253 is 352654631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352654631 = 7 ⋅50379233.

It can be written as a sum of positive squares in 2 ways, for example, as 64850809 + 71605444 = 8053^2 + 8462^2 .

It is a cyclic number.

It is not a de Polignac number, because 136456253 - 2⁴ = 136456237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136456213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232568 + ... + 233153.

It is an arithmetic number, because the mean of its divisors is an integer number (34230567).

Almost surely, 2^136456253 is an apocalyptic number.

It is an amenable number.

136456253 is a deficient number, since it is larger than the sum of its proper divisors (466015).

136456253 is an equidigital number, since it uses as much as digits as its factorization.

136456253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466014.

The product of its digits is 64800, while the sum is 35.

The square root of 136456253 is about 11681.4490967517. The cubic root of 136456253 is about 514.8307521898.

The spelling of 136456253 in words is "one hundred thirty-six million, four hundred fifty-six thousand, two hundred fifty-three".