25961749 has 8 divisors (see below), whose sum is σ = 28359360. Its totient is φ = 23570400.

The previous prime is 25961743. The next prime is 25961773. The reversal of 25961749 is 94716952.

It is a happy number.

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 25961749 - 2⁵ = 25961717 is a prime.

It is a super-2 number, since 2×25961749² = 1348024822278002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25961743) 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, 13264 + ... + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (3544920).

Almost surely, 2^25961749 is an apocalyptic number.

It is an amenable number.

25961749 is a deficient number, since it is larger than the sum of its proper divisors (2397611).

25961749 is a wasteful number, since it uses less digits than its factorization.

25961749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 136080, while the sum is 43.

The square root of 25961749 is about 5095.2673138904. The cubic root of 25961749 is about 296.1042554899.

The spelling of 25961749 in words is "twenty-five million, nine hundred sixty-one thousand, seven hundred forty-nine".