42642943 has 16 divisors (see below), whose sum is σ = 51181056. Its totient is φ = 34737120.

The previous prime is 42642913. The next prime is 42642967. The reversal of 42642943 is 34924624.

It is a cyclic number.

It is not a de Polignac number, because 42642943 - 2¹³ = 42634751 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 42642899 and 42642908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42642913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27088 + ... + 28618.

It is an arithmetic number, because the mean of its divisors is an integer number (3198816).

Almost surely, 2^42642943 is an apocalyptic number.

42642943 is a deficient number, since it is larger than the sum of its proper divisors (8538113).

42642943 is a wasteful number, since it uses less digits than its factorization.

42642943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734.

The product of its digits is 41472, while the sum is 34.

The square root of 42642943 is about 6530.1564299793. The cubic root of 42642943 is about 349.3674097256.

The spelling of 42642943 in words is "forty-two million, six hundred forty-two thousand, nine hundred forty-three".