25028217 has 8 divisors (see below), whose sum is σ = 37078880. Its totient is φ = 16685460.

The previous prime is 25028203. The next prime is 25028219. The reversal of 25028217 is 71282052.

It is not a de Polignac number, because 25028217 - 2⁷ = 25028089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 926971 = 25028217 / (2 + 5 + 0 + 2 + 8 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25028219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463459 + ... + 463512.

It is an arithmetic number, because the mean of its divisors is an integer number (4634860).

Almost surely, 2^25028217 is an apocalyptic number.

25028217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25028217 is a deficient number, since it is larger than the sum of its proper divisors (12050663).

25028217 is an equidigital number, since it uses as much as digits as its factorization.

25028217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926980 (or 926974 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25028217 is about 5002.8209042499. The cubic root of 25028217 is about 292.5117418035.

The spelling of 25028217 in words is "twenty-five million, twenty-eight thousand, two hundred seventeen".