136320421 has 8 divisors (see below), whose sum is σ = 145848800. Its totient is φ = 127027440.

The previous prime is 136320413. The next prime is 136320427. The reversal of 136320421 is 124023631.

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 136320421 - 2³ = 136320413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136320392 and 136320401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136320427) 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, 57651 + ... + 59968.

It is an arithmetic number, because the mean of its divisors is an integer number (18231100).

Almost surely, 2^136320421 is an apocalyptic number.

It is an amenable number.

136320421 is a deficient number, since it is larger than the sum of its proper divisors (9528379).

136320421 is a wasteful number, since it uses less digits than its factorization.

136320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117699.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 136320421 is about 11675.6336444751. The cubic root of 136320421 is about 514.6598703001.

The spelling of 136320421 in words is "one hundred thirty-six million, three hundred twenty thousand, four hundred twenty-one".