6420371 has 4 divisors (see below), whose sum is σ = 6492600. Its totient is φ = 6348144.

The previous prime is 6420353. The next prime is 6420377. The reversal of 6420371 is 1730246.

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 6420371 - 2⁶ = 6420307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420377) 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, 35981 + ... + 36158.

It is an arithmetic number, because the mean of its divisors is an integer number (1623150).

Almost surely, 2^6420371 is an apocalyptic number.

6420371 is a deficient number, since it is larger than the sum of its proper divisors (72229).

6420371 is an equidigital number, since it uses as much as digits as its factorization.

6420371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72228.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 6420371 is about 2533.8451018166. The cubic root of 6420371 is about 185.8603318082.

The spelling of 6420371 in words is "six million, four hundred twenty thousand, three hundred seventy-one".