254991243 has 16 divisors (see below), whose sum is σ = 366992640. Its totient is φ = 156552864.

The previous prime is 254991199. The next prime is 254991257. The reversal of 254991243 is 342199452.

It is not a de Polignac number, because 254991243 - 2⁸ = 254990987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (254991293) 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, 9898 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (22937040).

Almost surely, 2^254991243 is an apocalyptic number.

254991243 is a deficient number, since it is larger than the sum of its proper divisors (112001397).

254991243 is a wasteful number, since it uses less digits than its factorization.

254991243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218.

The product of its digits is 77760, while the sum is 39.

The square root of 254991243 is about 15968.4452280114. The cubic root of 254991243 is about 634.1253115026.

The spelling of 254991243 in words is "two hundred fifty-four million, nine hundred ninety-one thousand, two hundred forty-three".