136465021 has 8 divisors (see below), whose sum is σ = 170138304. Its totient is φ = 106336320.

The previous prime is 136464953. The next prime is 136465027. The reversal of 136465021 is 120564631.

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

It is a cyclic number.

It is not a de Polignac number, because 136465021 - 2⁷ = 136464893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136465027) 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, 886060 + ... + 886213.

It is an arithmetic number, because the mean of its divisors is an integer number (21267288).

Almost surely, 2^136465021 is an apocalyptic number.

136465021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136465021 is a deficient number, since it is larger than the sum of its proper divisors (33673283).

136465021 is a wasteful number, since it uses less digits than its factorization.

136465021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772291.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 136465021 is about 11681.8243866273. The cubic root of 136465021 is about 514.8417787746.

The spelling of 136465021 in words is "one hundred thirty-six million, four hundred sixty-five thousand, twenty-one".