25284217 has 8 divisors (see below), whose sum is σ = 28929600. Its totient is φ = 21647184.

The previous prime is 25284211. The next prime is 25284221. The reversal of 25284217 is 71248252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25284217 - 2²³ = 16895609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25284211) 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 7 ways as a sum of consecutive naturals, for example, 7134 + ... + 10072.

It is an arithmetic number, because the mean of its divisors is an integer number (3616200).

Almost surely, 2^25284217 is an apocalyptic number.

It is an amenable number.

25284217 is a deficient number, since it is larger than the sum of its proper divisors (3645383).

25284217 is a wasteful number, since it uses less digits than its factorization.

25284217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175.

The product of its digits is 8960, while the sum is 31.

The square root of 25284217 is about 5028.3413766370. The cubic root of 25284217 is about 293.5056750961.

The spelling of 25284217 in words is "twenty-five million, two hundred eighty-four thousand, two hundred seventeen".