7942543 has 4 divisors (see below), whose sum is σ = 9077200. Its totient is φ = 6807888.

The previous prime is 7942537. The next prime is 7942559. The reversal of 7942543 is 3452497.

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 7942543 - 2⁵ = 7942511 is a prime.

It is a Duffinian number.

7942543 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7942499 and 7942508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7942523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567318 + ... + 567331.

It is an arithmetic number, because the mean of its divisors is an integer number (2269300).

Almost surely, 2^7942543 is an apocalyptic number.

7942543 is a deficient number, since it is larger than the sum of its proper divisors (1134657).

7942543 is a wasteful number, since it uses less digits than its factorization.

7942543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134656.

The product of its digits is 30240, while the sum is 34.

The square root of 7942543 is about 2818.2517630616. The cubic root of 7942543 is about 199.5200407838.

The spelling of 7942543 in words is "seven million, nine hundred forty-two thousand, five hundred forty-three".