25479825 has 24 divisors (see below), whose sum is σ = 48145728. Its totient is φ = 11647680.

The previous prime is 25479823. The next prime is 25479827. The reversal of 25479825 is 52897452.

It is an interprime number because it is at equal distance from previous prime (25479823) and next prime (25479827).

It is not a de Polignac number, because 25479825 - 2¹ = 25479823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25479823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23742 + ... + 24791.

It is an arithmetic number, because the mean of its divisors is an integer number (2006072).

Almost surely, 2^25479825 is an apocalyptic number.

25479825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25479825 is a deficient number, since it is larger than the sum of its proper divisors (22665903).

25479825 is a wasteful number, since it uses less digits than its factorization.

25479825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48553 (or 48548 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 25479825 is about 5047.7544512387. The cubic root of 25479825 is about 294.2606208602.

It can be divided in two parts, 2547 and 9825, that multiplied together give a triangular number (25024275 = T₇₀₇₄).

The spelling of 25479825 in words is "twenty-five million, four hundred seventy-nine thousand, eight hundred twenty-five".