6420927 has 4 divisors (see below), whose sum is σ = 8561240. Its totient is φ = 4280616.

The previous prime is 6420913. The next prime is 6420959. The reversal of 6420927 is 7290246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6420927 - 2¹² = 6416831 is a prime.

It is a D-number.

It is a Duffinian number.

6420927 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6420894 and 6420903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420907) 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, 1070152 + ... + 1070157.

It is an arithmetic number, because the mean of its divisors is an integer number (2140310).

Almost surely, 2^6420927 is an apocalyptic number.

6420927 is a deficient number, since it is larger than the sum of its proper divisors (2140313).

6420927 is a wasteful number, since it uses less digits than its factorization.

6420927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140312.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 6420927 is about 2533.9548141196. The cubic root of 6420927 is about 185.8656967817.

The spelling of 6420927 in words is "six million, four hundred twenty thousand, nine hundred twenty-seven".