25798457 has 4 divisors (see below), whose sum is σ = 25811940. Its totient is φ = 25784976.

The previous prime is 25798427. The next prime is 25798511. The reversal of 25798457 is 75489752.

It is a happy number.

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 17131321 + 8667136 = 4139^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 25798457 - 2⁶ = 25798393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25798427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (6452985).

Almost surely, 2^25798457 is an apocalyptic number.

It is an amenable number.

25798457 is a deficient number, since it is larger than the sum of its proper divisors (13483).

25798457 is a wasteful number, since it uses less digits than its factorization.

25798457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13482.

The product of its digits is 705600, while the sum is 47.

The square root of 25798457 is about 5079.2181484949. The cubic root of 25798457 is about 295.4821455787.

The spelling of 25798457 in words is "twenty-five million, seven hundred ninety-eight thousand, four hundred fifty-seven".