25445442 has 16 divisors (see below), whose sum is σ = 55517472. Its totient is φ = 7710720.

The previous prime is 25445437. The next prime is 25445443. The reversal of 25445442 is 24454452.

It is not an unprimeable number, because it can be changed into a prime (25445443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 192703 + ... + 192834.

It is an arithmetic number, because the mean of its divisors is an integer number (3469842).

Almost surely, 2^25445442 is an apocalyptic number.

25445442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25445442 is an abundant number, since it is smaller than the sum of its proper divisors (30072030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25445442 is a wasteful number, since it uses less digits than its factorization.

25445442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385553.

The product of its digits is 25600, while the sum is 30.

The square root of 25445442 is about 5044.3475296613. The cubic root of 25445442 is about 294.1282008338.

Adding to 25445442 its reverse (24454452), we get a palindrome (49899894).

The spelling of 25445442 in words is "twenty-five million, four hundred forty-five thousand, four hundred forty-two".