7220427 has 16 divisors (see below), whose sum is σ = 10524672. Its totient is φ = 4383360.

The previous prime is 7220417. The next prime is 7220441. The reversal of 7220427 is 7240227.

It is not a de Polignac number, because 7220427 - 2⁷ = 7220299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7220397 and 7220406.

It is not an unprimeable number, because it can be changed into a prime (7220407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703 + ... + 3864.

It is an arithmetic number, because the mean of its divisors is an integer number (657792).

Almost surely, 2^7220427 is an apocalyptic number.

7220427 is a deficient number, since it is larger than the sum of its proper divisors (3304245).

7220427 is a wasteful number, since it uses less digits than its factorization.

7220427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4618.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 7220427 is about 2687.0852238066. The cubic root of 7220427 is about 193.2803160875.

The spelling of 7220427 in words is "seven million, two hundred twenty thousand, four hundred twenty-seven".