25561104 has 20 divisors (see below), whose sum is σ = 66032976. Its totient is φ = 8520352.

The previous prime is 25561079. The next prime is 25561139. The reversal of 25561104 is 40116552.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266214 + ... + 266309.

Almost surely, 2^25561104 is an apocalyptic number.

25561104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25561104 is an abundant number, since it is smaller than the sum of its proper divisors (40471872).

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

25561104 is a wasteful number, since it uses less digits than its factorization.

25561104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532534 (or 532528 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 25561104 is about 5055.7990466394. The cubic root of 25561104 is about 294.5731795548.

Adding to 25561104 its reverse (40116552), we get a palindrome (65677656).

The spelling of 25561104 in words is "twenty-five million, five hundred sixty-one thousand, one hundred four".