121408135 has 32 divisors (see below), whose sum is σ = 160807680. Its totient is φ = 87618048.

The previous prime is 121408127. The next prime is 121408139. The reversal of 121408135 is 531804121.

It is a cyclic number.

It is not a de Polignac number, because 121408135 - 2³ = 121408127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121408139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215364 + ... + 215926.

It is an arithmetic number, because the mean of its divisors is an integer number (5025240).

Almost surely, 2^121408135 is an apocalyptic number.

121408135 is a deficient number, since it is larger than the sum of its proper divisors (39399545).

121408135 is a wasteful number, since it uses less digits than its factorization.

121408135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 121408135 is about 11018.5359735311. The cubic root of 121408135 is about 495.1642280636.

The spelling of 121408135 in words is "one hundred twenty-one million, four hundred eight thousand, one hundred thirty-five".