25199425 has 6 divisors (see below), whose sum is σ = 31247318. Its totient is φ = 20159520.

The previous prime is 25199417. The next prime is 25199429. The reversal of 25199425 is 52499152.

It can be written as a sum of positive squares in 3 ways, for example, as 1218816 + 23980609 = 1104^2 + 4897^2 .

It is not a de Polignac number, because 25199425 - 2³ = 25199417 is a prime.

It is a super-2 number, since 2×25199425² = 1270022040661250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25199429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503964 + ... + 504013.

Almost surely, 2^25199425 is an apocalyptic number.

25199425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25199425 is a deficient number, since it is larger than the sum of its proper divisors (6047893).

25199425 is a wasteful number, since it uses less digits than its factorization.

25199425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007987 (or 1007982 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 25199425 is about 5019.9028875069. The cubic root of 25199425 is about 293.1772118886.

The spelling of 25199425 in words is "twenty-five million, one hundred ninety-nine thousand, four hundred twenty-five".