25718461 has 4 divisors (see below), whose sum is σ = 25946172. Its totient is φ = 25490752.

The previous prime is 25718453. The next prime is 25718479. The reversal of 25718461 is 16481752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1610361 + 24108100 = 1269^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 25718461 - 2³ = 25718453 is a prime.

It is a super-2 number, since 2×25718461² = 1322878472417042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25718431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113686 + ... + 113911.

It is an arithmetic number, because the mean of its divisors is an integer number (6486543).

Almost surely, 2^25718461 is an apocalyptic number.

It is an amenable number.

25718461 is a deficient number, since it is larger than the sum of its proper divisors (227711).

25718461 is a wasteful number, since it uses less digits than its factorization.

25718461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227710.

The product of its digits is 13440, while the sum is 34.

The square root of 25718461 is about 5071.3372003841. The cubic root of 25718461 is about 295.1764184630.

The spelling of 25718461 in words is "twenty-five million, seven hundred eighteen thousand, four hundred sixty-one".