42420244 has 12 divisors (see below), whose sum is σ = 74425204. Its totient is φ = 21155904.

The previous prime is 42420239. The next prime is 42420251. The reversal of 42420244 is 44202424.

It can be written as a sum of positive squares in 2 ways, for example, as 36602500 + 5817744 = 6050^2 + 2412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11769 + ... + 14944.

Almost surely, 2^42420244 is an apocalyptic number.

It is an amenable number.

42420244 is a deficient number, since it is larger than the sum of its proper divisors (32004960).

42420244 is a wasteful number, since it uses less digits than its factorization.

42420244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27114 (or 27112 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 42420244 is about 6513.0825267303. The cubic root of 42420244 is about 348.7581677836.

Adding to 42420244 its reverse (44202424), we get a palindrome (86622668).

The spelling of 42420244 in words is "forty-two million, four hundred twenty thousand, two hundred forty-four".