25500442 has 32 divisors (see below), whose sum is σ = 45287424. Its totient is φ = 10636800.

The previous prime is 25500439. The next prime is 25500443. The reversal of 25500442 is 24400552.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (25500443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14503 + ... + 16165.

It is an arithmetic number, because the mean of its divisors is an integer number (1415232).

Almost surely, 2^25500442 is an apocalyptic number.

25500442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25500442 is a deficient number, since it is larger than the sum of its proper divisors (19786982).

25500442 is a wasteful number, since it uses less digits than its factorization.

25500442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25500442 is about 5049.7962335128. The cubic root of 25500442 is about 294.3399664554.

Adding to 25500442 its reverse (24400552), we get a palindrome (49900994).

The spelling of 25500442 in words is "twenty-five million, five hundred thousand, four hundred forty-two".