42533891 has 8 divisors (see below), whose sum is σ = 44319744. Its totient is φ = 40773960.

The previous prime is 42533873. The next prime is 42533903. The reversal of 42533891 is 19833524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42533891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42533291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3095 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (5539968).

Almost surely, 2^42533891 is an apocalyptic number.

42533891 is a deficient number, since it is larger than the sum of its proper divisors (1785853).

42533891 is a wasteful number, since it uses less digits than its factorization.

42533891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12961.

The product of its digits is 25920, while the sum is 35.

The square root of 42533891 is about 6521.8012082553. The cubic root of 42533891 is about 349.0693397856.

The spelling of 42533891 in words is "forty-two million, five hundred thirty-three thousand, eight hundred ninety-one".