136734221 has 12 divisors (see below), whose sum is σ = 150955476. Its totient is φ = 123118080.

The previous prime is 136734209. The next prime is 136734229. The reversal of 136734221 is 122437631.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 22458121 + 114276100 = 4739^2 + 10690^2 .

It is not a de Polignac number, because 136734221 - 2²⁶ = 69625357 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136734229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18725 + ... + 24981.

It is an arithmetic number, because the mean of its divisors is an integer number (12579623).

Almost surely, 2^136734221 is an apocalyptic number.

It is an amenable number.

136734221 is a deficient number, since it is larger than the sum of its proper divisors (14221255).

136734221 is an equidigital number, since it uses as much as digits as its factorization.

136734221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352 (or 6311 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 136734221 is about 11693.3408827418. The cubic root of 136734221 is about 515.1800934856.

The spelling of 136734221 in words is "one hundred thirty-six million, seven hundred thirty-four thousand, two hundred twenty-one".