25226540 has 12 divisors (see below), whose sum is σ = 52975776. Its totient is φ = 10090608.

The previous prime is 25226483. The next prime is 25226567. The reversal of 25226540 is 4562252.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 630644 + ... + 630683.

It is an arithmetic number, because the mean of its divisors is an integer number (4414648).

Almost surely, 2^25226540 is an apocalyptic number.

25226540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25226540 is an abundant number, since it is smaller than the sum of its proper divisors (27749236).

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

25226540 is a wasteful number, since it uses less digits than its factorization.

25226540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261336 (or 1261334 counting only the distinct ones).

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

The square root of 25226540 is about 5022.6029108421. The cubic root of 25226540 is about 293.2823287122.

Adding to 25226540 its reverse (4562252), we get a palindrome (29788792).

The spelling of 25226540 in words is "twenty-five million, two hundred twenty-six thousand, five hundred forty".