6420507 has 4 divisors (see below), whose sum is σ = 8560680. Its totient is φ = 4280336.

The previous prime is 6420487. The next prime is 6420511. The reversal of 6420507 is 7050246.

It is a happy number.

6420507 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 6420507 - 2¹⁵ = 6387739 is a prime.

It is a D-number.

6420507 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6420587) 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, 1070082 + ... + 1070087.

It is an arithmetic number, because the mean of its divisors is an integer number (2140170).

Almost surely, 2^6420507 is an apocalyptic number.

6420507 is a deficient number, since it is larger than the sum of its proper divisors (2140173).

6420507 is a wasteful number, since it uses less digits than its factorization.

6420507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140172.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 6420507 is about 2533.8719383584. The cubic root of 6420507 is about 185.8616441325.

The spelling of 6420507 in words is "six million, four hundred twenty thousand, five hundred seven".