25732861 has 16 divisors (see below), whose sum is σ = 32279040. Its totient is φ = 19928880.

The previous prime is 25732853. The next prime is 25732879. The reversal of 25732861 is 16823752.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25732861 - 2³ = 25732853 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 (25732801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12850 + ... + 14716.

It is an arithmetic number, because the mean of its divisors is an integer number (2017440).

Almost surely, 2^25732861 is an apocalyptic number.

It is an amenable number.

25732861 is a deficient number, since it is larger than the sum of its proper divisors (6546179).

25732861 is a wasteful number, since it uses less digits than its factorization.

25732861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064.

The product of its digits is 20160, while the sum is 34.

The square root of 25732861 is about 5072.7567455970. The cubic root of 25732861 is about 295.2314988372.

The spelling of 25732861 in words is "twenty-five million, seven hundred thirty-two thousand, eight hundred sixty-one".