25715025 has 72 divisors (see below), whose sum is σ = 54550080. Its totient is φ = 11329920.

The previous prime is 25715023. The next prime is 25715029. The reversal of 25715025 is 52051752.

It is a happy number.

It is not a de Polignac number, because 25715025 - 2¹ = 25715023 is a prime.

It is a super-2 number, since 2×25715025² = 1322525021501250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25715025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25715021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 45394 + ... + 45956.

It is an arithmetic number, because the mean of its divisors is an integer number (757640).

Almost surely, 2^25715025 is an apocalyptic number.

25715025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25715025 is an abundant number, since it is smaller than the sum of its proper divisors (28835055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25715025 is a wasteful number, since it uses less digits than its factorization.

25715025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 25715025 is about 5070.9984224016. The cubic root of 25715025 is about 295.1632726357.

Adding to 25715025 its reverse (52051752), we get a palindrome (77766777).

The spelling of 25715025 in words is "twenty-five million, seven hundred fifteen thousand, twenty-five".