25642227 has 8 divisors (see below), whose sum is σ = 36819664. Its totient is φ = 15779808.

The previous prime is 25642223. The next prime is 25642231. The reversal of 25642227 is 72224652.

It is an interprime number because it is at equal distance from previous prime (25642223) and next prime (25642231).

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

It is not a de Polignac number, because 25642227 - 2² = 25642223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25642194 and 25642203.

It is not an unprimeable number, because it can be changed into a prime (25642223) 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, 328708 + ... + 328785.

It is an arithmetic number, because the mean of its divisors is an integer number (4602458).

Almost surely, 2^25642227 is an apocalyptic number.

25642227 is a deficient number, since it is larger than the sum of its proper divisors (11177437).

25642227 is a wasteful number, since it uses less digits than its factorization.

25642227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657509.

The product of its digits is 13440, while the sum is 30.

The square root of 25642227 is about 5063.8154587228. The cubic root of 25642227 is about 294.8844783721.

Adding to 25642227 its reverse (72224652), we get a palindrome (97866879).

The spelling of 25642227 in words is "twenty-five million, six hundred forty-two thousand, two hundred twenty-seven".