25521375 has 64 divisors (see below), whose sum is σ = 48522240. Its totient is φ = 11792000.

The previous prime is 25521371. The next prime is 25521407. The reversal of 25521375 is 57312552.

It is not a de Polignac number, because 25521375 - 2² = 25521371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25521371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94741 + ... + 95009.

It is an arithmetic number, because the mean of its divisors is an integer number (758160).

Almost surely, 2^25521375 is an apocalyptic number.

25521375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25521375 is the 4125-th pentagonal number.

25521375 is a deficient number, since it is larger than the sum of its proper divisors (23000865).

25521375 is a wasteful number, since it uses less digits than its factorization.

25521375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 311 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 25521375 is about 5051.8684662212. The cubic root of 25521375 is about 294.4204844499.

The spelling of 25521375 in words is "twenty-five million, five hundred twenty-one thousand, three hundred seventy-five".