25998461 has 4 divisors (see below), whose sum is σ = 26489052. Its totient is φ = 25507872.

The previous prime is 25998449. The next prime is 25998463. The reversal of 25998461 is 16489952.

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 23088025 + 2910436 = 4805^2 + 1706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25998461 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 (25998463) 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, 245216 + ... + 245321.

It is an arithmetic number, because the mean of its divisors is an integer number (6622263).

Almost surely, 2^25998461 is an apocalyptic number.

It is an amenable number.

25998461 is a deficient number, since it is larger than the sum of its proper divisors (490591).

25998461 is an equidigital number, since it uses as much as digits as its factorization.

25998461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490590.

The product of its digits is 155520, while the sum is 44.

The square root of 25998461 is about 5098.8685999935. The cubic root of 25998461 is about 296.2437614928.

The spelling of 25998461 in words is "twenty-five million, nine hundred ninety-eight thousand, four hundred sixty-one".