25280725 has 6 divisors (see below), whose sum is σ = 31348130. Its totient is φ = 20224560.

The previous prime is 25280713. The next prime is 25280743. The reversal of 25280725 is 52708252.

It can be written as a sum of positive squares in 3 ways, for example, as 7107556 + 18173169 = 2666^2 + 4263^2 .

It is not a de Polignac number, because 25280725 - 2⁷ = 25280597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505590 + ... + 505639.

Almost surely, 2^25280725 is an apocalyptic number.

25280725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25280725 is a deficient number, since it is larger than the sum of its proper divisors (6067405).

25280725 is a wasteful number, since it uses less digits than its factorization.

25280725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011239 (or 1011234 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 25280725 is about 5027.9941328526. The cubic root of 25280725 is about 293.4921624635.

Adding to 25280725 its reverse (52708252), we get a palindrome (77988977).

The spelling of 25280725 in words is "twenty-five million, two hundred eighty thousand, seven hundred twenty-five".