254457491 has 4 divisors (see below), whose sum is σ = 258255432. Its totient is φ = 250659552.

The previous prime is 254457461. The next prime is 254457493. The reversal of 254457491 is 194754452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 254457491 - 2¹⁴ = 254441107 is a prime.

It is a super-2 number, since 2×254457491² = 129497229452030162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254457493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898870 + ... + 1899003.

It is an arithmetic number, because the mean of its divisors is an integer number (64563858).

Almost surely, 2^254457491 is an apocalyptic number.

254457491 is a deficient number, since it is larger than the sum of its proper divisors (3797941).

254457491 is an equidigital number, since it uses as much as digits as its factorization.

254457491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797940.

The product of its digits is 201600, while the sum is 41.

The square root of 254457491 is about 15951.7237626534. The cubic root of 254457491 is about 633.6825484689.

The spelling of 254457491 in words is "two hundred fifty-four million, four hundred fifty-seven thousand, four hundred ninety-one".