25071617 has 6 divisors (see below), whose sum is σ = 26633478. Its totient is φ = 23596544.

The previous prime is 25071611. The next prime is 25071619. The reversal of 25071617 is 71617052.

It can be written as a sum of positive squares in 3 ways, for example, as 10086976 + 14984641 = 3176^2 + 3871^2 .

It is not a de Polignac number, because 25071617 - 2¹⁰ = 25070593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25071617.

It is not an unprimeable number, because it can be changed into a prime (25071611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43088 + ... + 43665.

It is an arithmetic number, because the mean of its divisors is an integer number (4438913).

Almost surely, 2^25071617 is an apocalyptic number.

It is an amenable number.

25071617 is a deficient number, since it is larger than the sum of its proper divisors (1561861).

25071617 is an equidigital number, since it uses as much as digits as its factorization.

25071617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86787 (or 86770 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 25071617 is about 5007.1565783386. The cubic root of 25071617 is about 292.6807201311.

Adding to 25071617 its reverse (71617052), we get a palindrome (96688669).

The spelling of 25071617 in words is "twenty-five million, seventy-one thousand, six hundred seventeen".