136420881 has 8 divisors (see below), whose sum is σ = 181948704. Its totient is φ = 90920160.

The previous prime is 136420859. The next prime is 136420883. The reversal of 136420881 is 188024631.

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

It is not a de Polignac number, because 136420881 - 2⁵ = 136420849 is a prime.

It is a super-2 number, since 2×136420881² = 37221313545632322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (136420883) 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, 14685 + ... + 22101.

It is an arithmetic number, because the mean of its divisors is an integer number (22743588).

Almost surely, 2^136420881 is an apocalyptic number.

It is an amenable number.

136420881 is a deficient number, since it is larger than the sum of its proper divisors (45527823).

136420881 is an equidigital number, since it uses as much as digits as its factorization.

136420881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13551.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 136420881 is about 11679.9349741341. The cubic root of 136420881 is about 514.7862637751.

The spelling of 136420881 in words is "one hundred thirty-six million, four hundred twenty thousand, eight hundred eighty-one".