42985133 has 4 divisors (see below), whose sum is σ = 43007040. Its totient is φ = 42963228.

The previous prime is 42985073. The next prime is 42985139. The reversal of 42985133 is 33158924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42985133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42985093 and 42985102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42985139) 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, 7685 + ... + 12042.

It is an arithmetic number, because the mean of its divisors is an integer number (10751760).

Almost surely, 2^42985133 is an apocalyptic number.

It is an amenable number.

42985133 is a deficient number, since it is larger than the sum of its proper divisors (21907).

42985133 is a wasteful number, since it uses less digits than its factorization.

42985133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906.

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

The square root of 42985133 is about 6556.3048281788. The cubic root of 42985133 is about 350.2994254008.

The spelling of 42985133 in words is "forty-two million, nine hundred eighty-five thousand, one hundred thirty-three".