25806242 has 48 divisors (see below), whose sum is σ = 50528448. Its totient is φ = 9767520.

The previous prime is 25806227. The next prime is 25806257. The reversal of 25806242 is 24260852.

It is an interprime number because it is at equal distance from previous prime (25806227) and next prime (25806257).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39563 + ... + 40209.

It is an arithmetic number, because the mean of its divisors is an integer number (1052676).

Almost surely, 2^25806242 is an apocalyptic number.

25806242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25806242 is a deficient number, since it is larger than the sum of its proper divisors (24722206).

25806242 is a wasteful number, since it uses less digits than its factorization.

25806242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 25806242 is about 5079.9844487951. The cubic root of 25806242 is about 295.5118643736.

The spelling of 25806242 in words is "twenty-five million, eight hundred six thousand, two hundred forty-two".