25491461 has 4 divisors (see below), whose sum is σ = 25507500. Its totient is φ = 25475424.

The previous prime is 25491457. The next prime is 25491467. The reversal of 25491461 is 16419452.

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 21808900 + 3682561 = 4670^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 25491461 - 2² = 25491457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491467) 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, 5336 + ... + 8913.

It is an arithmetic number, because the mean of its divisors is an integer number (6376875).

Almost surely, 2^25491461 is an apocalyptic number.

It is an amenable number.

25491461 is a deficient number, since it is larger than the sum of its proper divisors (16039).

25491461 is a wasteful number, since it uses less digits than its factorization.

25491461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16038.

The product of its digits is 8640, while the sum is 32.

The square root of 25491461 is about 5048.9069114017. The cubic root of 25491461 is about 294.3054078697.

It can be divided in two parts, 25491 and 461, that added together give a palindrome (25952).

The spelling of 25491461 in words is "twenty-five million, four hundred ninety-one thousand, four hundred sixty-one".