154121994 has 32 divisors (see below), whose sum is σ = 368840640. Its totient is φ = 47421936.

The previous prime is 154121971. The next prime is 154122041. The reversal of 154121994 is 499121451.

It is a happy number.

154121994 is a `hidden beast` number, since 1 + 541 + 21 + 9 + 94 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109072 + ... + 110475.

It is an arithmetic number, because the mean of its divisors is an integer number (11526270).

Almost surely, 2^154121994 is an apocalyptic number.

154121994 is an abundant number, since it is smaller than the sum of its proper divisors (214718646).

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

154121994 is a wasteful number, since it uses less digits than its factorization.

154121994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219571 (or 219565 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 154121994 is about 12414.5879512773. The cubic root of 154121994 is about 536.1523407664.

The spelling of 154121994 in words is "one hundred fifty-four million, one hundred twenty-one thousand, nine hundred ninety-four".