25881442 has 16 divisors (see below), whose sum is σ = 39913632. Its totient is φ = 12579840.

The previous prime is 25881433. The next prime is 25881451. The reversal of 25881442 is 24418852.

It is an interprime number because it is at equal distance from previous prime (25881433) and next prime (25881451).

It is a junction number, because it is equal to n+sod(n) for n = 25881398 and 25881407.

It is an unprimeable number.

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, 21517 + ... + 22687.

It is an arithmetic number, because the mean of its divisors is an integer number (2494602).

Almost surely, 2^25881442 is an apocalyptic number.

25881442 is a deficient number, since it is larger than the sum of its proper divisors (14032190).

25881442 is a wasteful number, since it uses less digits than its factorization.

25881442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its digits is 20480, while the sum is 34.

The square root of 25881442 is about 5087.3806619910. The cubic root of 25881442 is about 295.7986288633.

The spelling of 25881442 in words is "twenty-five million, eight hundred eighty-one thousand, four hundred forty-two".