25867217 has 16 divisors (see below), whose sum is σ = 28771200. Its totient is φ = 23143680.

The previous prime is 25867201. The next prime is 25867223. The reversal of 25867217 is 71276852.

It is a cyclic number.

It is not a de Polignac number, because 25867217 - 2⁴ = 25867201 is a prime.

It is a super-2 number, since 2×25867217² = 1338225830650178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25867267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34634 + ... + 35372.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^25867217 is an apocalyptic number.

It is an amenable number.

25867217 is a deficient number, since it is larger than the sum of its proper divisors (2903983).

25867217 is a wasteful number, since it uses less digits than its factorization.

25867217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its digits is 47040, while the sum is 38.

The square root of 25867217 is about 5085.9824026436. The cubic root of 25867217 is about 295.7444264916.

The spelling of 25867217 in words is "twenty-five million, eight hundred sixty-seven thousand, two hundred seventeen".