25917601 has 4 divisors (see below), whose sum is σ = 26208900. Its totient is φ = 25626304.

The previous prime is 25917587. The next prime is 25917611. The reversal of 25917601 is 10671952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 17007376 = 2985^2 + 4124^2 .

It is not a de Polignac number, because 25917601 - 2¹¹ = 25915553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25917611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145516 + ... + 145693.

It is an arithmetic number, because the mean of its divisors is an integer number (6552225).

Almost surely, 2^25917601 is an apocalyptic number.

It is an amenable number.

25917601 is a deficient number, since it is larger than the sum of its proper divisors (291299).

25917601 is an equidigital number, since it uses as much as digits as its factorization.

25917601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291298.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 25917601 is about 5090.9332150402. The cubic root of 25917601 is about 295.9363183250.

The spelling of 25917601 in words is "twenty-five million, nine hundred seventeen thousand, six hundred one".