136274021 has 4 divisors (see below), whose sum is σ = 146756652. Its totient is φ = 125791392.

The previous prime is 136273999. The next prime is 136274051. The reversal of 136274021 is 120472631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68392900 + 67881121 = 8270^2 + 8239^2 .

It is a cyclic number.

It is not a de Polignac number, because 136274021 - 2⁶ = 136273957 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 (136274051) 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, 5241296 + ... + 5241321.

It is an arithmetic number, because the mean of its divisors is an integer number (36689163).

Almost surely, 2^136274021 is an apocalyptic number.

It is an amenable number.

136274021 is a deficient number, since it is larger than the sum of its proper divisors (10482631).

136274021 is a wasteful number, since it uses less digits than its factorization.

136274021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482630.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 136274021 is about 11673.6464311714. The cubic root of 136274021 is about 514.6014713023.

The spelling of 136274021 in words is "one hundred thirty-six million, two hundred seventy-four thousand, twenty-one".