254491 has 2 divisors, whose sum is σ = 254492. Its totient is φ = 254490.

The previous prime is 254489. The next prime is 254519. The reversal of 254491 is 194452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254491 - 2¹ = 254489 is a prime.

Together with 254489, it forms a pair of twin primes.

254491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (254461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127245 + 127246.

It is an arithmetic number, because the mean of its divisors is an integer number (127246).

2²⁵⁴⁴⁹¹ is an apocalyptic number.

254491 is a deficient number, since it is larger than the sum of its proper divisors (1).

254491 is an equidigital number, since it uses as much as digits as its factorization.

254491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 254491 is about 504.4710100690. The cubic root of 254491 is about 63.3710363379.

The spelling of 254491 in words is "two hundred fifty-four thousand, four hundred ninety-one".