25479217 has 4 divisors (see below), whose sum is σ = 26021376. Its totient is φ = 24937060.

The previous prime is 25479211. The next prime is 25479221. The reversal of 25479217 is 71297452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25479217 - 2⁷ = 25479089 is a prime.

It is a super-3 number, since 3×25479217³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25479211) 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, 271009 + ... + 271102.

It is an arithmetic number, because the mean of its divisors is an integer number (6505344).

Almost surely, 2^25479217 is an apocalyptic number.

It is an amenable number.

25479217 is a deficient number, since it is larger than the sum of its proper divisors (542159).

25479217 is an equidigital number, since it uses as much as digits as its factorization.

25479217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542158.

The product of its digits is 35280, while the sum is 37.

The square root of 25479217 is about 5047.6942260799. The cubic root of 25479217 is about 294.2582802910.

The spelling of 25479217 in words is "twenty-five million, four hundred seventy-nine thousand, two hundred seventeen".