42543789 has 16 divisors (see below), whose sum is σ = 59035392. Its totient is φ = 27230528.

The previous prime is 42543769. The next prime is 42543803. The reversal of 42543789 is 98734524.

It is a cyclic number.

It is not a de Polignac number, because 42543789 - 2⁵ = 42543757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42543789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4627 + ... + 10319.

It is an arithmetic number, because the mean of its divisors is an integer number (3689712).

Almost surely, 2^42543789 is an apocalyptic number.

It is an amenable number.

42543789 is a deficient number, since it is larger than the sum of its proper divisors (16491603).

42543789 is a wasteful number, since it uses less digits than its factorization.

42543789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its digits is 241920, while the sum is 42.

The square root of 42543789 is about 6522.5600035569. The cubic root of 42543789 is about 349.0964148252.

The spelling of 42543789 in words is "forty-two million, five hundred forty-three thousand, seven hundred eighty-nine".