136072121 has 4 divisors (see below), whose sum is σ = 136285044. Its totient is φ = 135859200.

The previous prime is 136072087. The next prime is 136072133. The reversal of 136072121 is 121270631.

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 128029225 + 8042896 = 11315^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 136072121 - 2¹⁴ = 136055737 is a prime.

It is a super-2 number, since 2×136072121² = 37031244226877282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136072621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105500 + ... + 106781.

It is an arithmetic number, because the mean of its divisors is an integer number (34071261).

Almost surely, 2^136072121 is an apocalyptic number.

It is an amenable number.

136072121 is a deficient number, since it is larger than the sum of its proper divisors (212923).

136072121 is an equidigital number, since it uses as much as digits as its factorization.

136072121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212922.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 136072121 is about 11664.9955422195. The cubic root of 136072121 is about 514.3472056949.

The spelling of 136072121 in words is "one hundred thirty-six million, seventy-two thousand, one hundred twenty-one".