25271540 has 24 divisors (see below), whose sum is σ = 60652032. Its totient is φ = 8664480.

The previous prime is 25271531. The next prime is 25271551. The reversal of 25271540 is 4517252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90116 + ... + 90395.

It is an arithmetic number, because the mean of its divisors is an integer number (2527168).

Almost surely, 2^25271540 is an apocalyptic number.

25271540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25271540 is an abundant number, since it is smaller than the sum of its proper divisors (35380492).

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

25271540 is a wasteful number, since it uses less digits than its factorization.

25271540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180527 (or 180525 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25271540 is about 5027.0806637650. The cubic root of 25271540 is about 293.4566142735.

Adding to 25271540 its reverse (4517252), we get a palindrome (29788792).

The spelling of 25271540 in words is "twenty-five million, two hundred seventy-one thousand, five hundred forty".