25997951 has 4 divisors (see below), whose sum is σ = 29711952. Its totient is φ = 22283952.

The previous prime is 25997941. The next prime is 25997953. The reversal of 25997951 is 15979952.

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

It is a cyclic number.

It is not a de Polignac number, because 25997951 - 2⁶ = 25997887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25997896 and 25997905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25997953) 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, 1856990 + ... + 1857003.

It is an arithmetic number, because the mean of its divisors is an integer number (7427988).

Almost surely, 2^25997951 is an apocalyptic number.

25997951 is a deficient number, since it is larger than the sum of its proper divisors (3714001).

25997951 is an equidigital number, since it uses as much as digits as its factorization.

25997951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714000.

The product of its digits is 255150, while the sum is 47.

The square root of 25997951 is about 5098.8185886537. The cubic root of 25997951 is about 296.2418243870.

The spelling of 25997951 in words is "twenty-five million, nine hundred ninety-seven thousand, nine hundred fifty-one".