6722427 has 4 divisors (see below), whose sum is σ = 8963240. Its totient is φ = 4481616.

The previous prime is 6722423. The next prime is 6722473. The reversal of 6722427 is 7242276.

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

It is not a de Polignac number, because 6722427 - 2² = 6722423 is a prime.

It is a D-number.

It is a Duffinian number.

6722427 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6722394 and 6722403.

It is not an unprimeable number, because it can be changed into a prime (6722423) 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, 1120402 + ... + 1120407.

It is an arithmetic number, because the mean of its divisors is an integer number (2240810).

Almost surely, 2^6722427 is an apocalyptic number.

6722427 is a deficient number, since it is larger than the sum of its proper divisors (2240813).

6722427 is a wasteful number, since it uses less digits than its factorization.

6722427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240812.

The product of its digits is 9408, while the sum is 30.

The square root of 6722427 is about 2592.7643548923. The cubic root of 6722427 is about 188.7304744213.

The spelling of 6722427 in words is "six million, seven hundred twenty-two thousand, four hundred twenty-seven".