42065519 has 4 divisors (see below), whose sum is σ = 42109296. Its totient is φ = 42021744.

The previous prime is 42065501. The next prime is 42065521. The reversal of 42065519 is 91556024.

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 42065519 - 2¹² = 42061423 is a prime.

It is a super-2 number, since 2×42065519² = 3539015777478722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42065119) 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, 20414 + ... + 22379.

It is an arithmetic number, because the mean of its divisors is an integer number (10527324).

Almost surely, 2^42065519 is an apocalyptic number.

42065519 is a deficient number, since it is larger than the sum of its proper divisors (43777).

42065519 is an equidigital number, since it uses as much as digits as its factorization.

42065519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43776.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 42065519 is about 6485.7936291560. The cubic root of 42065519 is about 347.7833212079.

The spelling of 42065519 in words is "forty-two million, sixty-five thousand, five hundred nineteen".