25056749 has 4 divisors (see below), whose sum is σ = 25315164. Its totient is φ = 24798336.

The previous prime is 25056721. The next prime is 25056751. The reversal of 25056749 is 94765052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 14212900 = 3293^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 25056749 - 2²⁴ = 8279533 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25056149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129062 + ... + 129255.

It is an arithmetic number, because the mean of its divisors is an integer number (6328791).

Almost surely, 2^25056749 is an apocalyptic number.

It is an amenable number.

25056749 is a deficient number, since it is larger than the sum of its proper divisors (258415).

25056749 is an equidigital number, since it uses as much as digits as its factorization.

25056749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258414.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 25056749 is about 5005.6716832010. The cubic root of 25056749 is about 292.6228534018.

The spelling of 25056749 in words is "twenty-five million, fifty-six thousand, seven hundred forty-nine".