25349991 has 8 divisors (see below), whose sum is σ = 33844080. Its totient is φ = 16877952.

The previous prime is 25349981. The next prime is 25350001. The reversal of 25349991 is 19994352.

It is an interprime number because it is at equal distance from previous prime (25349981) and next prime (25350001).

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

It is not a de Polignac number, because 25349991 - 2²³ = 16961383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25349981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2610 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (4230510).

Almost surely, 2^25349991 is an apocalyptic number.

25349991 is a deficient number, since it is larger than the sum of its proper divisors (8494089).

25349991 is a wasteful number, since it uses less digits than its factorization.

25349991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025.

The product of its digits is 87480, while the sum is 42.

The square root of 25349991 is about 5034.8774563042. The cubic root of 25349991 is about 293.7599618773.

The spelling of 25349991 in words is "twenty-five million, three hundred forty-nine thousand, nine hundred ninety-one".