25495861 has 6 divisors (see below), whose sum is σ = 26104470. Its totient is φ = 24901128.

The previous prime is 25495829. The next prime is 25495889. The reversal of 25495861 is 16859452.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 184900 = 5031^2 + 430^2 .

It is not a de Polignac number, because 25495861 - 2⁵ = 25495829 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 (25493861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5046 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (4350745).

Almost surely, 2^25495861 is an apocalyptic number.

It is an amenable number.

25495861 is a deficient number, since it is larger than the sum of its proper divisors (608609).

25495861 is an equidigital number, since it uses as much as digits as its factorization.

25495861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13875 (or 13832 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 25495861 is about 5049.3426304817. The cubic root of 25495861 is about 294.3223399356.

The spelling of 25495861 in words is "twenty-five million, four hundred ninety-five thousand, eight hundred sixty-one".