42407643 has 4 divisors (see below), whose sum is σ = 56543528. Its totient is φ = 28271760.

The previous prime is 42407623. The next prime is 42407647. The reversal of 42407643 is 34670424.

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

It is not a de Polignac number, because 42407643 - 2¹⁴ = 42391259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42407643.

It is not an unprimeable number, because it can be changed into a prime (42407647) 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, 7067938 + ... + 7067943.

It is an arithmetic number, because the mean of its divisors is an integer number (14135882).

Almost surely, 2^42407643 is an apocalyptic number.

42407643 is a deficient number, since it is larger than the sum of its proper divisors (14135885).

42407643 is a wasteful number, since it uses less digits than its factorization.

42407643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14135884.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 42407643 is about 6512.1150941917. The cubic root of 42407643 is about 348.7236313101.

The spelling of 42407643 in words is "forty-two million, four hundred seven thousand, six hundred forty-three".