121472154 has 36 divisors (see below), whose sum is σ = 275151786. Its totient is φ = 38727216.

The previous prime is 121472137. The next prime is 121472161. The reversal of 121472154 is 451274121.

It can be written as a sum of positive squares in only one way, i.e., 100100025 + 21372129 = 10005^2 + 4623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3144 + ... + 15900.

Almost surely, 2^121472154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121472154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137575893).

121472154 is an abundant number, since it is smaller than the sum of its proper divisors (153679632).

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

121472154 is a wasteful number, since it uses less digits than its factorization.

121472154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12811 (or 12785 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 121472154 is about 11021.4406499332. The cubic root of 121472154 is about 495.2512468028.

The spelling of 121472154 in words is "one hundred twenty-one million, four hundred seventy-two thousand, one hundred fifty-four".