136653121 has 4 divisors (see below), whose sum is σ = 149076144. Its totient is φ = 124230100.

The previous prime is 136653103. The next prime is 136653151. The reversal of 136653121 is 121356631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136653121 - 2⁹ = 136652609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136653121.

It is not an unprimeable number, because it can be changed into a prime (136653151) 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, 6211495 + ... + 6211516.

It is an arithmetic number, because the mean of its divisors is an integer number (37269036).

Almost surely, 2^136653121 is an apocalyptic number.

136653121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136653121 is a deficient number, since it is larger than the sum of its proper divisors (12423023).

136653121 is a wasteful number, since it uses less digits than its factorization.

136653121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12423022.

The product of its digits is 3240, while the sum is 28.

The square root of 136653121 is about 11689.8725827102. The cubic root of 136653121 is about 515.0782185528.

It can be divided in two parts, 136 and 653121, that multiplied together give a triangular number (88824456 = T₁₃₃₂₈).

The spelling of 136653121 in words is "one hundred thirty-six million, six hundred fifty-three thousand, one hundred twenty-one".