136401251 has 24 divisors (see below), whose sum is σ = 168838560. Its totient is φ = 109492992.

The previous prime is 136401241. The next prime is 136401253. The reversal of 136401251 is 152104631.

It is not a de Polignac number, because 136401251 - 2²⁶ = 69292387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136401253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310490 + ... + 310928.

It is an arithmetic number, because the mean of its divisors is an integer number (7034940).

Almost surely, 2^136401251 is an apocalyptic number.

136401251 is a deficient number, since it is larger than the sum of its proper divisors (32437309).

136401251 is a wasteful number, since it uses less digits than its factorization.

136401251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 136401251 is about 11679.0946138817. The cubic root of 136401251 is about 514.7615712231.

Adding to 136401251 its reverse (152104631), we get a palindrome (288505882).

The spelling of 136401251 in words is "one hundred thirty-six million, four hundred one thousand, two hundred fifty-one".