121615169 has 16 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 110231616.

The previous prime is 121615163. The next prime is 121615187. The reversal of 121615169 is 961516121.

It is a cyclic number.

It is not a de Polignac number, because 121615169 - 2¹² = 121611073 is a prime.

It is a super-2 number, since 2×121615169² = 29580498661797122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121615163) 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, 290042 + ... + 290460.

It is an arithmetic number, because the mean of its divisors is an integer number (8334900).

Almost surely, 2^121615169 is an apocalyptic number.

It is an amenable number.

121615169 is a deficient number, since it is larger than the sum of its proper divisors (11743231).

121615169 is a wasteful number, since it uses less digits than its factorization.

121615169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784.

The product of its digits is 3240, while the sum is 32.

The square root of 121615169 is about 11027.9267770511. The cubic root of 121615169 is about 495.4455316008.

The spelling of 121615169 in words is "one hundred twenty-one million, six hundred fifteen thousand, one hundred sixty-nine".