42319 has 4 divisors (see below), whose sum is σ = 42840. Its totient is φ = 41800.

The previous prime is 42307. The next prime is 42323. The reversal of 42319 is 91324.

42319 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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 42319 - 2¹³ = 34127 is a prime.

It is a super-2 number, since 2×42319² = 3581795522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42296 and 42305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42349) 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, 109 + ... + 310.

It is an arithmetic number, because the mean of its divisors is an integer number (10710).

2⁴²³¹⁹ is an apocalyptic number.

42319 is a deficient number, since it is larger than the sum of its proper divisors (521).

42319 is a wasteful number, since it uses less digits than its factorization.

42319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its digits is 216, while the sum is 19.

The square root of 42319 is about 205.7158234070. The cubic root of 42319 is about 34.8480487467.

It can be divided in two parts, 42 and 319, that added together give a square (361 = 19²).

The spelling of 42319 in words is "forty-two thousand, three hundred nineteen".