25275991 has 8 divisors (see below), whose sum is σ = 28821744. Its totient is φ = 21959040.

The previous prime is 25275983. The next prime is 25276007. The reversal of 25275991 is 19957252.

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 25275991 - 2³ = 25275983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25275931) 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 7 ways as a sum of consecutive naturals, for example, 56965 + ... + 57406.

It is an arithmetic number, because the mean of its divisors is an integer number (3602718).

Almost surely, 2^25275991 is an apocalyptic number.

25275991 is a deficient number, since it is larger than the sum of its proper divisors (3545753).

25275991 is a wasteful number, since it uses less digits than its factorization.

25275991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114401.

The product of its digits is 56700, while the sum is 40.

The square root of 25275991 is about 5027.5233465395. The cubic root of 25275991 is about 293.4738418044.

The spelling of 25275991 in words is "twenty-five million, two hundred seventy-five thousand, nine hundred ninety-one".