42912643 has 4 divisors (see below), whose sum is σ = 42926688. Its totient is φ = 42898600.

The previous prime is 42912631. The next prime is 42912677. The reversal of 42912643 is 34621924.

It is a happy number.

42912643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42912643 - 2²¹ = 40815491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42912143) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 283 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (10731672).

Almost surely, 2^42912643 is an apocalyptic number.

42912643 is a deficient number, since it is larger than the sum of its proper divisors (14045).

42912643 is an equidigital number, since it uses as much as digits as its factorization.

42912643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14044.

The product of its digits is 10368, while the sum is 31.

The square root of 42912643 is about 6550.7742290511. The cubic root of 42912643 is about 350.1023999698.

The spelling of 42912643 in words is "forty-two million, nine hundred twelve thousand, six hundred forty-three".