42143594 has 4 divisors (see below), whose sum is σ = 63215394. Its totient is φ = 21071796.

The previous prime is 42143593. The next prime is 42143597. The reversal of 42143594 is 49534124.

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

It can be written as a sum of positive squares in only one way, i.e., 22915369 + 19228225 = 4787^2 + 4385^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42143594.

It is not an unprimeable number, because it can be changed into a prime (42143593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10535897 + ... + 10535900.

Almost surely, 2^42143594 is an apocalyptic number.

42143594 is a deficient number, since it is larger than the sum of its proper divisors (21071800).

42143594 is a wasteful number, since it uses less digits than its factorization.

42143594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21071799.

The product of its digits is 17280, while the sum is 32.

The square root of 42143594 is about 6491.8097630784. The cubic root of 42143594 is about 347.9983540240.

The spelling of 42143594 in words is "forty-two million, one hundred forty-three thousand, five hundred ninety-four".