42819287 has 6 divisors (see below), whose sum is σ = 49810248. Its totient is φ = 36702204.

The previous prime is 42819251. The next prime is 42819289. The reversal of 42819287 is 78291824.

It is not a de Polignac number, because 42819287 - 2⁶ = 42819223 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 (42819289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436883 + ... + 436980.

It is an arithmetic number, because the mean of its divisors is an integer number (8301708).

Almost surely, 2^42819287 is an apocalyptic number.

42819287 is a deficient number, since it is larger than the sum of its proper divisors (6990961).

42819287 is an equidigital number, since it uses as much as digits as its factorization.

42819287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873877 (or 873870 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 42819287 is about 6543.6447794788. The cubic root of 42819287 is about 349.8483342881.

The spelling of 42819287 in words is "forty-two million, eight hundred nineteen thousand, two hundred eighty-seven".