42009419 has 4 divisors (see below), whose sum is σ = 42698160. Its totient is φ = 41320680.

The previous prime is 42009413. The next prime is 42009421. The reversal of 42009419 is 91490024.

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 42009419 - 2⁴ = 42009403 is a prime.

It is a super-2 number, since 2×42009419² = 3529582569435122, 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 = 42009391 and 42009400.

It is not an unprimeable number, because it can be changed into a prime (42009413) 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, 344279 + ... + 344400.

It is an arithmetic number, because the mean of its divisors is an integer number (10674540).

Almost surely, 2^42009419 is an apocalyptic number.

42009419 is a deficient number, since it is larger than the sum of its proper divisors (688741).

42009419 is an equidigital number, since it uses as much as digits as its factorization.

42009419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688740.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 42009419 is about 6481.4673492968. The cubic root of 42009419 is about 347.6286472250.

The spelling of 42009419 in words is "forty-two million, nine thousand, four hundred nineteen".