136340421 has 16 divisors (see below), whose sum is σ = 210605184. Its totient is φ = 76840704.

The previous prime is 136340383. The next prime is 136340423. The reversal of 136340421 is 124043631.

It is not a de Polignac number, because 136340421 - 2⁹ = 136339909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136340391 and 136340400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136340423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42936 + ... + 46001.

It is an arithmetic number, because the mean of its divisors is an integer number (13162824).

Almost surely, 2^136340421 is an apocalyptic number.

It is an amenable number.

136340421 is a deficient number, since it is larger than the sum of its proper divisors (74264763).

136340421 is an equidigital number, since it uses as much as digits as its factorization.

136340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89020.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 136340421 is about 11676.4900976278. The cubic root of 136340421 is about 514.6850381950.

The spelling of 136340421 in words is "one hundred thirty-six million, three hundred forty thousand, four hundred twenty-one".