136510421 has 8 divisors (see below), whose sum is σ = 144094080. Its totient is φ = 128966688.

The previous prime is 136510417. The next prime is 136510477. The reversal of 136510421 is 124015631.

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 136510421 - 2² = 136510417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136510411) 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, 2816 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (18011760).

Almost surely, 2^136510421 is an apocalyptic number.

It is an amenable number.

136510421 is a deficient number, since it is larger than the sum of its proper divisors (7583659).

136510421 is a wasteful number, since it uses less digits than its factorization.

136510421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19963.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 136510421 is about 11683.7674146655. The cubic root of 136510421 is about 514.8988659926.

The spelling of 136510421 in words is "one hundred thirty-six million, five hundred ten thousand, four hundred twenty-one".