25042517 has 4 divisors (see below), whose sum is σ = 25055136. Its totient is φ = 25029900.

The previous prime is 25042499. The next prime is 25042519. The reversal of 25042517 is 71524052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25042517 - 2⁸ = 25042261 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 (25042519) 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, 2609 + ... + 7542.

It is an arithmetic number, because the mean of its divisors is an integer number (6263784).

Almost surely, 2^25042517 is an apocalyptic number.

It is an amenable number.

25042517 is a deficient number, since it is larger than the sum of its proper divisors (12619).

25042517 is a wasteful number, since it uses less digits than its factorization.

25042517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12618.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25042517 is about 5004.2498938402. The cubic root of 25042517 is about 292.5674405576.

Adding to 25042517 its reverse (71524052), we get a palindrome (96566569).

The spelling of 25042517 in words is "twenty-five million, forty-two thousand, five hundred seventeen".