25417523 has 2 divisors, whose sum is σ = 25417524. Its totient is φ = 25417522.

The previous prime is 25417519. The next prime is 25417549. The reversal of 25417523 is 32571452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25417523 - 2² = 25417519 is a prime.

It is not a weakly prime, because it can be changed into another prime (25417583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12708761 + 12708762.

It is an arithmetic number, because the mean of its divisors is an integer number (12708762).

Almost surely, 2^25417523 is an apocalyptic number.

25417523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25417523 is an equidigital number, since it uses as much as digits as its factorization.

25417523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 25417523 is about 5041.5794152230. The cubic root of 25417523 is about 294.0205879732.

Adding to 25417523 its reverse (32571452), we get a palindrome (57988975).

The spelling of 25417523 in words is "twenty-five million, four hundred seventeen thousand, five hundred twenty-three".