254091491 has 4 divisors (see below), whose sum is σ = 254143800. Its totient is φ = 254039184.

The previous prime is 254091479. The next prime is 254091517. The reversal of 254091491 is 194190452.

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 254091491 - 2¹⁰ = 254090467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254091091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18026 + ... + 28863.

It is an arithmetic number, because the mean of its divisors is an integer number (63535950).

Almost surely, 2^254091491 is an apocalyptic number.

254091491 is a deficient number, since it is larger than the sum of its proper divisors (52309).

254091491 is an equidigital number, since it uses as much as digits as its factorization.

254091491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52308.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 254091491 is about 15940.2475200356. The cubic root of 254091491 is about 633.3785827012.

The spelling of 254091491 in words is "two hundred fifty-four million, ninety-one thousand, four hundred ninety-one".