136791261 has 24 divisors (see below), whose sum is σ = 206859744. Its totient is φ = 90324720.

The previous prime is 136791253. The next prime is 136791283. The reversal of 136791261 is 162197631.

It is not a de Polignac number, because 136791261 - 2³ = 136791253 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136791661) 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 in 23 ways as a sum of consecutive naturals, for example, 23371 + ... + 28631.

It is an arithmetic number, because the mean of its divisors is an integer number (8619156).

Almost surely, 2^136791261 is an apocalyptic number.

It is an amenable number.

136791261 is a deficient number, since it is larger than the sum of its proper divisors (70068483).

136791261 is an equidigital number, since it uses as much as digits as its factorization.

136791261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383 (or 5371 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 136791261 is about 11695.7796234368. The cubic root of 136791261 is about 515.2517209759.

The spelling of 136791261 in words is "one hundred thirty-six million, seven hundred ninety-one thousand, two hundred sixty-one".