25717005 has 24 divisors (see below), whose sum is σ = 47199672. Its totient is φ = 12908544.

The previous prime is 25716991. The next prime is 25717007. The reversal of 25717005 is 50071752.

It can be written as a sum of positive squares in 4 ways, for example, as 1687401 + 24029604 = 1299^2 + 4902^2 .

It is not a de Polignac number, because 25717005 - 2⁴ = 25716989 is a prime.

It is a super-2 number, since 2×25717005² = 1322728692340050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25717005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25717007) 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, 16044 + ... + 17573.

It is an arithmetic number, because the mean of its divisors is an integer number (1966653).

Almost surely, 2^25717005 is an apocalyptic number.

It is an amenable number.

25717005 is a deficient number, since it is larger than the sum of its proper divisors (21482667).

25717005 is a wasteful number, since it uses less digits than its factorization.

25717005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33645 (or 33642 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 25717005 is about 5071.1936464702. The cubic root of 25717005 is about 295.1708480808.

Adding to 25717005 its reverse (50071752), we get a palindrome (75788757).

The spelling of 25717005 in words is "twenty-five million, seven hundred seventeen thousand, five".