25491525 has 12 divisors (see below), whose sum is σ = 42146112. Its totient is φ = 13595440.

The previous prime is 25491523. The next prime is 25491539. The reversal of 25491525 is 52519452.

It is not a de Polignac number, because 25491525 - 2¹ = 25491523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169869 + ... + 170018.

It is an arithmetic number, because the mean of its divisors is an integer number (3512176).

Almost surely, 2^25491525 is an apocalyptic number.

25491525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25491525 is a deficient number, since it is larger than the sum of its proper divisors (16654587).

25491525 is a wasteful number, since it uses less digits than its factorization.

25491525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339900 (or 339895 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 25491525 is about 5048.9132494033. The cubic root of 25491525 is about 294.3056541683.

The spelling of 25491525 in words is "twenty-five million, four hundred ninety-one thousand, five hundred twenty-five".