121553154 has 12 divisors (see below), whose sum is σ = 263365206. Its totient is φ = 40517712.

The previous prime is 121553149. The next prime is 121553161. The reversal of 121553154 is 451355121.

121553154 is a `hidden beast` number, since 121 + 5 + 531 + 5 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 2634129 = 10905^2 + 1623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3376459 + ... + 3376494.

Almost surely, 2^121553154 is an apocalyptic number.

121553154 is an abundant number, since it is smaller than the sum of its proper divisors (141812052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121553154 is a wasteful number, since it uses less digits than its factorization.

121553154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752961 (or 6752958 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 121553154 is about 11025.1146932810. The cubic root of 121553154 is about 495.3613034054.

The spelling of 121553154 in words is "one hundred twenty-one million, five hundred fifty-three thousand, one hundred fifty-four".