25122725 has 12 divisors (see below), whose sum is σ = 31431396. Its totient is φ = 19918080.

The previous prime is 25122697. The next prime is 25122733. The reversal of 25122725 is 52722152.

It can be written as a sum of positive squares in 6 ways, for example, as 9740641 + 15382084 = 3121^2 + 3922^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25122725 is a prime.

It is a super-2 number, since 2×25122725² = 1262302622851250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25122694 and 25122703.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1622 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (2619283).

Almost surely, 2^25122725 is an apocalyptic number.

25122725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25122725 is a deficient number, since it is larger than the sum of its proper divisors (6308671).

25122725 is a wasteful number, since it uses less digits than its factorization.

25122725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016 (or 9011 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 25122725 is about 5012.2574754296. The cubic root of 25122725 is about 292.8794597877.

Adding to 25122725 its reverse (52722152), we get a palindrome (77844877).

The spelling of 25122725 in words is "twenty-five million, one hundred twenty-two thousand, seven hundred twenty-five".