25561072 has 10 divisors (see below), whose sum is σ = 49524608. Its totient is φ = 12780528.

The previous prime is 25561057. The next prime is 25561079. The reversal of 25561072 is 27016552.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 25561072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561079) by changing a digit.

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 as a sum of consecutive naturals, namely, 798768 + ... + 798799.

Almost surely, 2^25561072 is an apocalyptic number.

It is an amenable number.

25561072 is a deficient number, since it is larger than the sum of its proper divisors (23963536).

25561072 is a wasteful number, since it uses less digits than its factorization.

25561072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597575 (or 1597569 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 25561072 is about 5055.7958819557. The cubic root of 25561072 is about 294.5730566292.

The spelling of 25561072 in words is "twenty-five million, five hundred sixty-one thousand, seventy-two".