121538265 has 16 divisors (see below), whose sum is σ = 194628096. Its totient is φ = 64764800.

The previous prime is 121538237. The next prime is 121538267. The reversal of 121538265 is 562835121.

It is not a de Polignac number, because 121538265 - 2⁸ = 121538009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121538267) 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, 19480 + ... + 24950.

It is an arithmetic number, because the mean of its divisors is an integer number (12164256).

Almost surely, 2^121538265 is an apocalyptic number.

121538265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121538265 is a deficient number, since it is larger than the sum of its proper divisors (73089831).

121538265 is a wasteful number, since it uses less digits than its factorization.

121538265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its digits is 14400, while the sum is 33.

The square root of 121538265 is about 11024.4394415317. The cubic root of 121538265 is about 495.3410770398.

The spelling of 121538265 in words is "one hundred twenty-one million, five hundred thirty-eight thousand, two hundred sixty-five".