12002019 has 4 divisors (see below), whose sum is σ = 16002696. Its totient is φ = 8001344.

The previous prime is 12001999. The next prime is 12002059. The reversal of 12002019 is 91020021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91020021 = 3 ⋅30340007.

It is a cyclic number.

It is not a de Polignac number, because 12002019 - 2⁵ = 12001987 is a prime.

It is a super-2 number, since 2×12002019² = 288096920152722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12001989 and 12002007.

It is not an unprimeable number, because it can be changed into a prime (12002059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000334 + ... + 2000339.

It is an arithmetic number, because the mean of its divisors is an integer number (4000674).

Almost surely, 2^12002019 is an apocalyptic number.

12002019 is a deficient number, since it is larger than the sum of its proper divisors (4000677).

12002019 is an equidigital number, since it uses as much as digits as its factorization.

12002019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000676.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 12002019 is about 3464.3930204294. The cubic root of 12002019 is about 228.9556876687.

The spelling of 12002019 in words is "twelve million, two thousand, nineteen".