42890543 has 4 divisors (see below), whose sum is σ = 45147960. Its totient is φ = 40633128.

The previous prime is 42890537. The next prime is 42890557. The reversal of 42890543 is 34509824.

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 42890543 - 2¹⁴ = 42874159 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42890563) 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, 1128680 + ... + 1128717.

It is an arithmetic number, because the mean of its divisors is an integer number (11286990).

Almost surely, 2^42890543 is an apocalyptic number.

42890543 is a deficient number, since it is larger than the sum of its proper divisors (2257417).

42890543 is a wasteful number, since it uses less digits than its factorization.

42890543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257416.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 42890543 is about 6549.0871883034. The cubic root of 42890543 is about 350.0422887678.

The spelling of 42890543 in words is "forty-two million, eight hundred ninety thousand, five hundred forty-three".