6420086 has 4 divisors (see below), whose sum is σ = 9630132. Its totient is φ = 3210042.

The previous prime is 6420079. The next prime is 6420103. The reversal of 6420086 is 6800246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6800246 = 2 ⋅3400123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605020 + ... + 1605023.

It is an arithmetic number, because the mean of its divisors is an integer number (2407533).

Almost surely, 2^6420086 is an apocalyptic number.

6420086 is a deficient number, since it is larger than the sum of its proper divisors (3210046).

6420086 is a wasteful number, since it uses less digits than its factorization.

6420086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210045.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6420086 is about 2533.7888625535. The cubic root of 6420086 is about 185.8575816567.

The spelling of 6420086 in words is "six million, four hundred twenty thousand, eighty-six".