42931724 has 24 divisors (see below), whose sum is σ = 83189568. Its totient is φ = 19221840.

The previous prime is 42931723. The next prime is 42931747. The reversal of 42931724 is 42713924.

It is a super-2 number, since 2×42931724² = 3686265851224352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42931723) 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 7 ways as a sum of consecutive naturals, for example, 4334 + ... + 10229.

It is an arithmetic number, because the mean of its divisors is an integer number (3466232).

Almost surely, 2^42931724 is an apocalyptic number.

42931724 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42931724 is a deficient number, since it is larger than the sum of its proper divisors (40257844).

42931724 is a wasteful number, since it uses less digits than its factorization.

42931724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14645 (or 14643 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 42931724 is about 6552.2304599274. The cubic root of 42931724 is about 350.1542830011.

The spelling of 42931724 in words is "forty-two million, nine hundred thirty-one thousand, seven hundred twenty-four".