154032921 has 45 divisors (see below), whose sum is σ = 269031279. Its totient is φ = 87572016.

The previous prime is 154032919. The next prime is 154032929. The reversal of 154032921 is 129230451.

The square root of 154032921 is 12411.

It is a perfect power (a square), and thus also a powerful number.

154032921 is a `hidden beast` number, since 1 + 540 + 32 + 92 + 1 = 666.

154032921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 150921225 + 3111696 = 12285^2 + 1764^2 .

It is not a de Polignac number, because 154032921 - 2¹ = 154032919 is a prime.

It is a super-2 number, since 2×154032921² = 47452281503584482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (154032929) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 781795 + ... + 781991.

Almost surely, 2^154032921 is an apocalyptic number.

154032921 is the 12411-st square number.

154032921 is the 6206-th centered octagonal number.

It is an amenable number.

154032921 is a deficient number, since it is larger than the sum of its proper divisors (114998358).

154032921 is an frugal number, since it uses more digits than its factorization.

154032921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The cubic root of 154032921 is about 536.0490332083.

The spelling of 154032921 in words is "one hundred fifty-four million, thirty-two thousand, nine hundred twenty-one".