25698442 has 48 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 9676800.

The previous prime is 25698433. The next prime is 25698451. The reversal of 25698442 is 24489652.

It is an interprime number because it is at equal distance from previous prime (25698433) and next prime (25698451).

It is a junction number, because it is equal to n+sod(n) for n = 25698395 and 25698404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33034 + ... + 33802.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^25698442 is an apocalyptic number.

25698442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25698442 is a deficient number, since it is larger than the sum of its proper divisors (24862838).

25698442 is a wasteful number, since it uses less digits than its factorization.

25698442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 820 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 25698442 is about 5069.3630763637. The cubic root of 25698442 is about 295.0998110980.

It can be divided in two parts, 2569 and 8442, that added together give a palindrome (11011).

The spelling of 25698442 in words is "twenty-five million, six hundred ninety-eight thousand, four hundred forty-two".