42770643 has 4 divisors (see below), whose sum is σ = 57027528. Its totient is φ = 28513760.

The previous prime is 42770633. The next prime is 42770671. The reversal of 42770643 is 34607724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42770643 - 2¹⁶ = 42705107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42770603) 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 3 ways as a sum of consecutive naturals, for example, 7128438 + ... + 7128443.

It is an arithmetic number, because the mean of its divisors is an integer number (14256882).

Almost surely, 2^42770643 is an apocalyptic number.

42770643 is a deficient number, since it is larger than the sum of its proper divisors (14256885).

42770643 is a wasteful number, since it uses less digits than its factorization.

42770643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256884.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 42770643 is about 6539.9268344531. The cubic root of 42770643 is about 349.7158046738.

The spelling of 42770643 in words is "forty-two million, seven hundred seventy thousand, six hundred forty-three".