254571921 has 12 divisors (see below), whose sum is σ = 368349072. Its totient is φ = 169421976.

The previous prime is 254571917. The next prime is 254571929. The reversal of 254571921 is 129175452.

It is not a de Polignac number, because 254571921 - 2² = 254571917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (254571929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18811 + ... + 29376.

It is an arithmetic number, because the mean of its divisors is an integer number (30695756).

Almost surely, 2^254571921 is an apocalyptic number.

It is an amenable number.

254571921 is a deficient number, since it is larger than the sum of its proper divisors (113777151).

254571921 is a wasteful number, since it uses less digits than its factorization.

254571921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48780 (or 48777 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 254571921 is about 15955.3101192048. The cubic root of 254571921 is about 633.7775236345. Note that the first 3 decimals are identical.

The spelling of 254571921 in words is "two hundred fifty-four million, five hundred seventy-one thousand, nine hundred twenty-one".