25564123 has 12 divisors (see below), whose sum is σ = 27826248. Its totient is φ = 23474880.

The previous prime is 25564117. The next prime is 25564129. The reversal of 25564123 is 32146552.

It is an interprime number because it is at equal distance from previous prime (25564117) and next prime (25564129).

It is not a de Polignac number, because 25564123 - 2⁹ = 25563611 is a prime.

It is a super-3 number, since 3×25564123³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25564091 and 25564100.

It is not an unprimeable number, because it can be changed into a prime (25564129) 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 11 ways as a sum of consecutive naturals, for example, 55711 + ... + 56167.

It is an arithmetic number, because the mean of its divisors is an integer number (2318854).

Almost surely, 2^25564123 is an apocalyptic number.

25564123 is a deficient number, since it is larger than the sum of its proper divisors (2262125).

25564123 is a wasteful number, since it uses less digits than its factorization.

25564123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 801 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 25564123 is about 5056.0976058617. The cubic root of 25564123 is about 294.5847763598.

The spelling of 25564123 in words is "twenty-five million, five hundred sixty-four thousand, one hundred twenty-three".