25829217 has 12 divisors (see below), whose sum is σ = 37408020. Its totient is φ = 17173728.

The previous prime is 25829213. The next prime is 25829233. The reversal of 25829217 is 71292852.

It can be written as a sum of positive squares in 2 ways, for example, as 23126481 + 2702736 = 4809^2 + 1644^2 .

It is not a de Polignac number, because 25829217 - 2² = 25829213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25829213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42 + ... + 7187.

It is an arithmetic number, because the mean of its divisors is an integer number (3117335).

Almost surely, 2^25829217 is an apocalyptic number.

It is an amenable number.

25829217 is a deficient number, since it is larger than the sum of its proper divisors (11578803).

25829217 is a wasteful number, since it uses less digits than its factorization.

25829217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632 (or 7629 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 25829217 is about 5082.2452715311. The cubic root of 25829217 is about 295.5995352976.

The spelling of 25829217 in words is "twenty-five million, eight hundred twenty-nine thousand, two hundred seventeen".