25661052 has 18 divisors (see below), whose sum is σ = 64865528. Its totient is φ = 8553672.

The previous prime is 25661029. The next prime is 25661071. The reversal of 25661052 is 25016652.

It is a tau number, because it is divible by the number of its divisors (18).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356368 + ... + 356439.

Almost surely, 2^25661052 is an apocalyptic number.

It is an amenable number.

25661052 is an abundant number, since it is smaller than the sum of its proper divisors (39204476).

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

25661052 is a wasteful number, since it uses less digits than its factorization.

25661052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712817 (or 712812 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25661052 is about 5065.6738939651. The cubic root of 25661052 is about 294.9566229432.

The spelling of 25661052 in words is "twenty-five million, six hundred sixty-one thousand, fifty-two".