129995154 has 12 divisors (see below), whose sum is σ = 281656206. Its totient is φ = 43331712.

The previous prime is 129995147. The next prime is 129995189. The reversal of 129995154 is 451599921.

129995154 is a `hidden beast` number, since 129 + 9 + 9 + 515 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 78801129 + 51194025 = 8877^2 + 7155^2 .

It is a Curzon number.

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, 3610959 + ... + 3610994.

Almost surely, 2^129995154 is an apocalyptic number.

129995154 is an abundant number, since it is smaller than the sum of its proper divisors (151661052).

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

129995154 is a wasteful number, since it uses less digits than its factorization.

129995154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221961 (or 7221958 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The square root of 129995154 is about 11401.5417378528. The cubic root of 129995154 is about 506.5734072543.

The spelling of 129995154 in words is "one hundred twenty-nine million, nine hundred ninety-five thousand, one hundred fifty-four".