254571891 has 16 divisors (see below), whose sum is σ = 392832000. Its totient is φ = 143627328.

The previous prime is 254571857. The next prime is 254571913. The reversal of 254571891 is 198175452.

It is not a de Polignac number, because 254571891 - 2⁶ = 254571827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (254571841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75066 + ... + 78383.

It is an arithmetic number, because the mean of its divisors is an integer number (24552000).

Almost surely, 2^254571891 is an apocalyptic number.

254571891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

254571891 is a deficient number, since it is larger than the sum of its proper divisors (138260109).

254571891 is a wasteful number, since it uses less digits than its factorization.

254571891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153538.

The product of its digits is 100800, while the sum is 42.

The square root of 254571891 is about 15955.3091790789. The cubic root of 254571891 is about 633.7774987387. Note that the first 3 decimals are identical.

The spelling of 254571891 in words is "two hundred fifty-four million, five hundred seventy-one thousand, eight hundred ninety-one".