42543599 has 16 divisors (see below), whose sum is σ = 50200128. Its totient is φ = 35292672.

The previous prime is 42543581. The next prime is 42543617. The reversal of 42543599 is 99534524.

It is an interprime number because it is at equal distance from previous prime (42543581) and next prime (42543617).

It is not a de Polignac number, because 42543599 - 2¹² = 42539503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543509) 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, 71447 + ... + 72039.

It is an arithmetic number, because the mean of its divisors is an integer number (3137508).

Almost surely, 2^42543599 is an apocalyptic number.

42543599 is a deficient number, since it is larger than the sum of its proper divisors (7656529).

42543599 is a wasteful number, since it uses less digits than its factorization.

42543599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914.

The product of its digits is 194400, while the sum is 41.

The square root of 42543599 is about 6522.5454387072. The cubic root of 42543599 is about 349.0958951378.

The spelling of 42543599 in words is "forty-two million, five hundred forty-three thousand, five hundred ninety-nine".