25170641 has 2 divisors, whose sum is σ = 25170642. Its totient is φ = 25170640.

The previous prime is 25170617. The next prime is 25170647. The reversal of 25170641 is 14607152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23425600 + 1745041 = 4840^2 + 1321^2 .

It is a cyclic number.

It is not a de Polignac number, because 25170641 - 2⁶ = 25170577 is a prime.

It is a super-2 number, since 2×25170641² = 1267122336701762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25170641.

It is not a weakly prime, because it can be changed into another prime (25170647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585320 + 12585321.

It is an arithmetic number, because the mean of its divisors is an integer number (12585321).

Almost surely, 2^25170641 is an apocalyptic number.

It is an amenable number.

25170641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25170641 is an equidigital number, since it uses as much as digits as its factorization.

25170641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 25170641 is about 5017.0350806029. The cubic root of 25170641 is about 293.0655423038.

Adding to 25170641 its reverse (14607152), we get a palindrome (39777793).

The spelling of 25170641 in words is "twenty-five million, one hundred seventy thousand, six hundred forty-one".