25262540 has 24 divisors (see below), whose sum is σ = 53923632. Its totient is φ = 9938880.

The previous prime is 25262537. The next prime is 25262557. The reversal of 25262540 is 4526252.

25262540 = 122² + 123² + ... + 426².

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, 9134 + ... + 11573.

It is an arithmetic number, because the mean of its divisors is an integer number (2246818).

Almost surely, 2^25262540 is an apocalyptic number.

25262540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25262540 is an abundant number, since it is smaller than the sum of its proper divisors (28661092).

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

25262540 is a wasteful number, since it uses less digits than its factorization.

25262540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20777 (or 20775 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 25262540 is about 5026.1854323135. The cubic root of 25262540 is about 293.4217737227.

Adding to 25262540 its reverse (4526252), we get a palindrome (29788792).

The spelling of 25262540 in words is "twenty-five million, two hundred sixty-two thousand, five hundred forty".