42340019 has 4 divisors (see below), whose sum is σ = 42353640. Its totient is φ = 42326400.

The previous prime is 42340009. The next prime is 42340027. The reversal of 42340019 is 91004324.

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 a de Polignac number, because none of the positive numbers 2^k-42340019 is a prime.

It is a super-2 number, since 2×42340019² = 3585354417840722, 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 = 42339976 and 42340003.

It is not an unprimeable number, because it can be changed into a prime (42340009) 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, 392 + ... + 9210.

It is an arithmetic number, because the mean of its divisors is an integer number (10588410).

Almost surely, 2^42340019 is an apocalyptic number.

42340019 is a deficient number, since it is larger than the sum of its proper divisors (13621).

42340019 is an equidigital number, since it uses as much as digits as its factorization.

42340019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13620.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42340019 is about 6506.9208539831. The cubic root of 42340019 is about 348.5381723449.

The spelling of 42340019 in words is "forty-two million, three hundred forty thousand, nineteen".