25129385 has 12 divisors (see below), whose sum is σ = 30616644. Its totient is φ = 19800480.

The previous prime is 25129373. The next prime is 25129397. The reversal of 25129385 is 58392152.

It is an interprime number because it is at equal distance from previous prime (25129373) and next prime (25129397).

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 9320809 = 3976^2 + 3053^2 .

It is not a de Polignac number, because 25129385 - 2⁸ = 25129129 is a prime.

It is a Duffinian 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, 24707 + ... + 25703.

It is an arithmetic number, because the mean of its divisors is an integer number (2551387).

Almost surely, 2^25129385 is an apocalyptic number.

It is an amenable number.

25129385 is a deficient number, since it is larger than the sum of its proper divisors (5487259).

25129385 is an frugal number, since it uses more digits than its factorization.

25129385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1073 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 25129385 is about 5012.9218027015. The cubic root of 25129385 is about 292.9053381489.

The spelling of 25129385 in words is "twenty-five million, one hundred twenty-nine thousand, three hundred eighty-five".