25491375 has 128 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 10627200.

The previous prime is 25491371. The next prime is 25491397. The reversal of 25491375 is 57319452.

It is not a de Polignac number, because 25491375 - 2² = 25491371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491371) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 307084 + ... + 307166.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^25491375 is an apocalyptic number.

25491375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25491375 is an abundant number, since it is smaller than the sum of its proper divisors (33214545).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25491375 is a wasteful number, since it uses less digits than its factorization.

25491375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 111 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 25491375 is about 5048.8983946996. The cubic root of 25491375 is about 294.3050769054.

The spelling of 25491375 in words is "twenty-five million, four hundred ninety-one thousand, three hundred seventy-five".