25271491 has 8 divisors (see below), whose sum is σ = 28918784. Its totient is φ = 21633480.

The previous prime is 25271473. The next prime is 25271497. The reversal of 25271491 is 19417252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25271491 - 2⁹ = 25270979 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (25271497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5116 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (3614848).

Almost surely, 2^25271491 is an apocalyptic number.

25271491 is a deficient number, since it is larger than the sum of its proper divisors (3647293).

25271491 is an equidigital number, since it uses as much as digits as its factorization.

25271491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641.

The product of its digits is 5040, while the sum is 31.

The square root of 25271491 is about 5027.0757901587. The cubic root of 25271491 is about 293.4564246084.

The spelling of 25271491 in words is "twenty-five million, two hundred seventy-one thousand, four hundred ninety-one".