42781833 has 6 divisors (see below), whose sum is σ = 61795994. Its totient is φ = 28521216.

The previous prime is 42781811. The next prime is 42781841. The reversal of 42781833 is 33818724.

It can be written as a sum of positive squares in only one way, i.e., 41641209 + 1140624 = 6453^2 + 1068^2 .

It is not a de Polignac number, because 42781833 - 2¹⁸ = 42519689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42781433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2376760 + ... + 2376777.

Almost surely, 2^42781833 is an apocalyptic number.

It is an amenable number.

42781833 is a deficient number, since it is larger than the sum of its proper divisors (19014161).

42781833 is a wasteful number, since it uses less digits than its factorization.

42781833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753543 (or 4753540 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 42781833 is about 6540.7822926619. The cubic root of 42781833 is about 349.7463005026.

It can be divided in two parts, 42 and 781833, that added together give a triangular number (781875 = T₁₂₅₀).

The spelling of 42781833 in words is "forty-two million, seven hundred eighty-one thousand, eight hundred thirty-three".