25717243 has 24 divisors (see below), whose sum is σ = 29442528. Its totient is φ = 22404096.

The previous prime is 25717217. The next prime is 25717249. The reversal of 25717243 is 34271752.

It is a de Polignac number, because none of the positive numbers 2^k-25717243 is a prime.

It is a super-2 number, since 2×25717243² = 1322753175042098, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25717249) 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, 352255 + ... + 352327.

It is an arithmetic number, because the mean of its divisors is an integer number (1226772).

Almost surely, 2^25717243 is an apocalyptic number.

25717243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25717243 is a deficient number, since it is larger than the sum of its proper divisors (3725285).

25717243 is a wasteful number, since it uses less digits than its factorization.

25717243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 166 counting only the distinct ones).

The product of its digits is 11760, while the sum is 31.

The square root of 25717243 is about 5071.2171122917. The cubic root of 25717243 is about 295.1717586384.

Adding to 25717243 its reverse (34271752), we get a palindrome (59988995).

The spelling of 25717243 in words is "twenty-five million, seven hundred seventeen thousand, two hundred forty-three".