25717013 has 24 divisors (see below), whose sum is σ = 32886720. Its totient is φ = 19958400.

The previous prime is 25717007. The next prime is 25717033. The reversal of 25717013 is 31071752.

It is not a de Polignac number, because 25717013 - 2¹² = 25712917 is a prime.

It is a super-2 number, since 2×25717013² = 1322729515284338, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25717033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20813 + ... + 22013.

It is an arithmetic number, because the mean of its divisors is an integer number (1370280).

Almost surely, 2^25717013 is an apocalyptic number.

25717013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25717013 is a deficient number, since it is larger than the sum of its proper divisors (7169707).

25717013 is a wasteful number, since it uses less digits than its factorization.

25717013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 25717013 is about 5071.1944352391. The cubic root of 25717013 is about 295.1708786878.

Adding to 25717013 its reverse (31071752), we get a palindrome (56788765).

The spelling of 25717013 in words is "twenty-five million, seven hundred seventeen thousand, thirteen".