6402019 has 4 divisors (see below), whose sum is σ = 6894496. Its totient is φ = 5909544.

The previous prime is 6402007. The next prime is 6402041. The reversal of 6402019 is 9102046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9102046 = 2 ⋅4551023.

It is a cyclic number.

It is not a de Polignac number, because 6402019 - 2⁵ = 6401987 is a prime.

It is a super-2 number, since 2×6402019² = 81971694552722, which contains 22 as substring.

It is a Duffinian number.

6402019 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6402049) 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, 246219 + ... + 246244.

It is an arithmetic number, because the mean of its divisors is an integer number (1723624).

Almost surely, 2^6402019 is an apocalyptic number.

6402019 is a deficient number, since it is larger than the sum of its proper divisors (492477).

6402019 is a wasteful number, since it uses less digits than its factorization.

6402019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492476.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6402019 is about 2530.2211365808. The cubic root of 6402019 is about 185.6830749749.

The spelling of 6402019 in words is "six million, four hundred two thousand, nineteen".