42670643 has 4 divisors (see below), whose sum is σ = 42686808. Its totient is φ = 42654480.

The previous prime is 42670619. The next prime is 42670651. The reversal of 42670643 is 34607624.

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 42670643 - 2⁸ = 42670387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42670613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098 + ... + 9743.

It is an arithmetic number, because the mean of its divisors is an integer number (10671702).

Almost surely, 2^42670643 is an apocalyptic number.

42670643 is a deficient number, since it is larger than the sum of its proper divisors (16165).

42670643 is a wasteful number, since it uses less digits than its factorization.

42670643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16164.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 42670643 is about 6532.2770149466. The cubic root of 42670643 is about 349.4430407046.

The spelling of 42670643 in words is "forty-two million, six hundred seventy thousand, six hundred forty-three".