25530042 has 16 divisors (see below), whose sum is σ = 51164352. Its totient is φ = 8492640.

The previous prime is 25530013. The next prime is 25530061. The reversal of 25530042 is 24003552.

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, 958 + ... + 7209.

It is an arithmetic number, because the mean of its divisors is an integer number (3197772).

Almost surely, 2^25530042 is an apocalyptic number.

25530042 is an abundant number, since it is smaller than the sum of its proper divisors (25634310).

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

25530042 is a wasteful number, since it uses less digits than its factorization.

25530042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8693.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25530042 is about 5052.7261948378. The cubic root of 25530042 is about 294.4538088500.

Adding to 25530042 its reverse (24003552), we get a palindrome (49533594).

The spelling of 25530042 in words is "twenty-five million, five hundred thirty thousand, forty-two".