25532861 has 8 divisors (see below), whose sum is σ = 27133560. Its totient is φ = 24026304.

The previous prime is 25532833. The next prime is 25532863. The reversal of 25532861 is 16823552.

It can be written as a sum of positive squares in 4 ways, for example, as 4280761 + 21252100 = 2069^2 + 4610^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25532861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2315 + ... + 7511.

It is an arithmetic number, because the mean of its divisors is an integer number (3391695).

Almost surely, 2^25532861 is an apocalyptic number.

It is an amenable number.

25532861 is a deficient number, since it is larger than the sum of its proper divisors (1600699).

25532861 is an frugal number, since it uses more digits than its factorization.

25532861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5214 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 25532861 is about 5053.0051454555. The cubic root of 25532861 is about 294.4646462096.

The spelling of 25532861 in words is "twenty-five million, five hundred thirty-two thousand, eight hundred sixty-one".