136885021 has 8 divisors (see below), whose sum is σ = 168473984. Its totient is φ = 108304560.

The previous prime is 136885013. The next prime is 136885031. The reversal of 136885021 is 120588631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136885021 - 2³ = 136885013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136885031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752025 + ... + 752206.

It is an arithmetic number, because the mean of its divisors is an integer number (21059248).

Almost surely, 2^136885021 is an apocalyptic number.

It is an amenable number.

136885021 is a deficient number, since it is larger than the sum of its proper divisors (31588963).

136885021 is a wasteful number, since it uses less digits than its factorization.

136885021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504251.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 136885021 is about 11699.7872202874. The cubic root of 136885021 is about 515.3694160382.

The spelling of 136885021 in words is "one hundred thirty-six million, eight hundred eighty-five thousand, twenty-one".