42655999 has 4 divisors (see below), whose sum is σ = 42669064. Its totient is φ = 42642936.

The previous prime is 42655993. The next prime is 42656011. The reversal of 42655999 is 99955624.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42655999 - 2⁵ = 42655967 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 (42655993) 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, 3109 + ... + 9745.

It is an arithmetic number, because the mean of its divisors is an integer number (10667266).

Almost surely, 2^42655999 is an apocalyptic number.

42655999 is a deficient number, since it is larger than the sum of its proper divisors (13065).

42655999 is an equidigital number, since it uses as much as digits as its factorization.

42655999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13064.

The product of its digits is 874800, while the sum is 49.

The square root of 42655999 is about 6531.1560232473. The cubic root of 42655999 is about 349.4030613884.

The spelling of 42655999 in words is "forty-two million, six hundred fifty-five thousand, nine hundred ninety-nine".