136544421 has 8 divisors (see below), whose sum is σ = 196063840. Its totient is φ = 84027312.

The previous prime is 136544417. The next prime is 136544437. The reversal of 136544421 is 124445631.

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

It is not a de Polignac number, because 136544421 - 2² = 136544417 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 (136544411) 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, 1750531 + ... + 1750608.

It is an arithmetic number, because the mean of its divisors is an integer number (24507980).

Almost surely, 2^136544421 is an apocalyptic number.

It is an amenable number.

136544421 is a deficient number, since it is larger than the sum of its proper divisors (59519419).

136544421 is a wasteful number, since it uses less digits than its factorization.

136544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501155.

The product of its digits is 11520, while the sum is 30.

The square root of 136544421 is about 11685.2223342134. Note that the first 3 decimals coincide. The cubic root of 136544421 is about 514.9416102463.

The spelling of 136544421 in words is "one hundred thirty-six million, five hundred forty-four thousand, four hundred twenty-one".