136124161 has 4 divisors (see below), whose sum is σ = 136167892. Its totient is φ = 136080432.

The previous prime is 136124137. The next prime is 136124179. The reversal of 136124161 is 161421631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73017025 + 63107136 = 8545^2 + 7944^2 .

It is a cyclic number.

It is not a de Polignac number, because 136124161 - 2⁵ = 136124129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136124561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16806 + ... + 23551.

It is an arithmetic number, because the mean of its divisors is an integer number (34041973).

Almost surely, 2^136124161 is an apocalyptic number.

It is an amenable number.

136124161 is a deficient number, since it is larger than the sum of its proper divisors (43731).

136124161 is an equidigital number, since it uses as much as digits as its factorization.

136124161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43730.

The product of its digits is 864, while the sum is 25.

The square root of 136124161 is about 11667.2259342142. The cubic root of 136124161 is about 514.4127670478.

Adding to 136124161 its reverse (161421631), we get a palindrome (297545792).

The spelling of 136124161 in words is "one hundred thirty-six million, one hundred twenty-four thousand, one hundred sixty-one".