42090250 has 32 divisors (see below), whose sum is σ = 81349632. Its totient is φ = 16290000.

The previous prime is 42090247. The next prime is 42090259. The reversal of 42090250 is 5209024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42090259) 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, 5035 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (2542176).

Almost surely, 2^42090250 is an apocalyptic number.

42090250 is a deficient number, since it is larger than the sum of its proper divisors (39259382).

42090250 is a wasteful number, since it uses less digits than its factorization.

42090250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479 (or 5469 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 42090250 is about 6487.6999005811. The cubic root of 42090250 is about 347.8514636716.

Adding to 42090250 its reverse (5209024), we get a palindrome (47299274).

The spelling of 42090250 in words is "forty-two million, ninety thousand, two hundred fifty".