154129921 has 24 divisors (see below), whose sum is σ = 174283200. Its totient is φ = 136165920.

The previous prime is 154129907. The next prime is 154129961. The reversal of 154129921 is 129921451.

It is not a de Polignac number, because 154129921 - 2⁷ = 154129793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154129961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1034355 + ... + 1034503.

It is an arithmetic number, because the mean of its divisors is an integer number (7261800).

Almost surely, 2^154129921 is an apocalyptic number.

154129921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154129921 is a deficient number, since it is larger than the sum of its proper divisors (20153279).

154129921 is a wasteful number, since it uses less digits than its factorization.

154129921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 346 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 154129921 is about 12414.9072086746. The cubic root of 154129921 is about 536.1615326337.

The spelling of 154129921 in words is "one hundred fifty-four million, one hundred twenty-nine thousand, nine hundred twenty-one".