42397724 has 6 divisors (see below), whose sum is σ = 74196024. Its totient is φ = 21198860.

The previous prime is 42397669. The next prime is 42397769. The reversal of 42397724 is 42779324.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5299712 + ... + 5299719.

It is an arithmetic number, because the mean of its divisors is an integer number (12366004).

Almost surely, 2^42397724 is an apocalyptic number.

It is an amenable number.

42397724 is a deficient number, since it is larger than the sum of its proper divisors (31798300).

42397724 is a wasteful number, since it uses less digits than its factorization.

42397724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10599435 (or 10599433 counting only the distinct ones).

The product of its digits is 84672, while the sum is 38.

The square root of 42397724 is about 6511.3534691337. The cubic root of 42397724 is about 348.6964407758.

The spelling of 42397724 in words is "forty-two million, three hundred ninety-seven thousand, seven hundred twenty-four".