25749725 has 6 divisors (see below), whose sum is σ = 31929690. Its totient is φ = 20599760.

The previous prime is 25749721. The next prime is 25749739. The reversal of 25749725 is 52794752.

It can be written as a sum of positive squares in 3 ways, for example, as 2353156 + 23396569 = 1534^2 + 4837^2 .

It is not a de Polignac number, because 25749725 - 2² = 25749721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25749721) 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 5 ways as a sum of consecutive naturals, for example, 514970 + ... + 515019.

It is an arithmetic number, because the mean of its divisors is an integer number (5321615).

Almost surely, 2^25749725 is an apocalyptic number.

25749725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25749725 is a deficient number, since it is larger than the sum of its proper divisors (6179965).

25749725 is a wasteful number, since it uses less digits than its factorization.

25749725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029999 (or 1029994 counting only the distinct ones).

The product of its digits is 176400, while the sum is 41.

The square root of 25749725 is about 5074.4186859186. The cubic root of 25749725 is about 295.2959779583.

The spelling of 25749725 in words is "twenty-five million, seven hundred forty-nine thousand, seven hundred twenty-five".