25422517 has 4 divisors (see below), whose sum is σ = 25449516. Its totient is φ = 25395520.

The previous prime is 25422499. The next prime is 25422533. The reversal of 25422517 is 71522452.

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 24512401 + 910116 = 4951^2 + 954^2 .

It is a cyclic number.

It is not a de Polignac number, because 25422517 - 2²³ = 17033909 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 (25422557) 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, 12034 + ... + 13987.

It is an arithmetic number, because the mean of its divisors is an integer number (6362379).

Almost surely, 2^25422517 is an apocalyptic number.

It is an amenable number.

25422517 is a deficient number, since it is larger than the sum of its proper divisors (26999).

25422517 is an equidigital number, since it uses as much as digits as its factorization.

25422517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26998.

The product of its digits is 5600, while the sum is 28.

The square root of 25422517 is about 5042.0746721960. The cubic root of 25422517 is about 294.0398429659.

Adding to 25422517 its reverse (71522452), we get a palindrome (96944969).

The spelling of 25422517 in words is "twenty-five million, four hundred twenty-two thousand, five hundred seventeen".