25722457 has 4 divisors (see below), whose sum is σ = 26349876. Its totient is φ = 25095040.

The previous prime is 25722451. The next prime is 25722469. The reversal of 25722457 is 75422752.

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 8904256 + 16818201 = 2984^2 + 4101^2 .

It is a cyclic number.

It is not a de Polignac number, because 25722457 - 2¹⁹ = 25198169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25722451) 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, 313648 + ... + 313729.

It is an arithmetic number, because the mean of its divisors is an integer number (6587469).

Almost surely, 2^25722457 is an apocalyptic number.

It is an amenable number.

25722457 is a deficient number, since it is larger than the sum of its proper divisors (627419).

25722457 is an equidigital number, since it uses as much as digits as its factorization.

25722457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627418.

The product of its digits is 39200, while the sum is 34.

The square root of 25722457 is about 5071.7311640110. The cubic root of 25722457 is about 295.1917053275.

The spelling of 25722457 in words is "twenty-five million, seven hundred twenty-two thousand, four hundred fifty-seven".