25818725 has 12 divisors (see below), whose sum is σ = 32797380. Its totient is φ = 20150400.

The previous prime is 25818707. The next prime is 25818757. The reversal of 25818725 is 52781852.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 407044 + 25411681 = 638^2 + 5041^2 .

It is not a de Polignac number, because 25818725 - 2⁸ = 25818469 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11570 + ... + 13619.

It is an arithmetic number, because the mean of its divisors is an integer number (2733115).

Almost surely, 2^25818725 is an apocalyptic number.

25818725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25818725 is a deficient number, since it is larger than the sum of its proper divisors (6978655).

25818725 is a wasteful number, since it uses less digits than its factorization.

25818725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25240 (or 25235 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 25818725 is about 5081.2129457444. The cubic root of 25818725 is about 295.5595050435.

The spelling of 25818725 in words is "twenty-five million, eight hundred eighteen thousand, seven hundred twenty-five".