42039019 has 4 divisors (see below), whose sum is σ = 45860760. Its totient is φ = 38217280.

The previous prime is 42039013. The next prime is 42039037. The reversal of 42039019 is 91093024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42039019 - 2⁵ = 42038987 is a prime.

It is a super-2 number, since 2×42039019² = 3534558236964722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42039013) 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, 1910854 + ... + 1910875.

It is an arithmetic number, because the mean of its divisors is an integer number (11465190).

Almost surely, 2^42039019 is an apocalyptic number.

42039019 is a deficient number, since it is larger than the sum of its proper divisors (3821741).

42039019 is a wasteful number, since it uses less digits than its factorization.

42039019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821740.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 42039019 is about 6483.7503807596. The cubic root of 42039019 is about 347.7102748885.

The spelling of 42039019 in words is "forty-two million, thirty-nine thousand, nineteen".