7222861 has 4 divisors (see below), whose sum is σ = 7229632. Its totient is φ = 7216092.

The previous prime is 7222849. The next prime is 7222903. The reversal of 7222861 is 1682227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1682227 = 1153 ⋅1459.

It is a cyclic number.

It is not a de Polignac number, because 7222861 - 2²¹ = 5125709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7222811) 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 3 ways as a sum of consecutive naturals, for example, 1395 + ... + 4048.

It is an arithmetic number, because the mean of its divisors is an integer number (1807408).

Almost surely, 2^7222861 is an apocalyptic number.

It is an amenable number.

7222861 is a deficient number, since it is larger than the sum of its proper divisors (6771).

7222861 is a wasteful number, since it uses less digits than its factorization.

7222861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770.

The product of its digits is 2688, while the sum is 28.

The square root of 7222861 is about 2687.5380927533. The cubic root of 7222861 is about 193.3020318594.

The spelling of 7222861 in words is "seven million, two hundred twenty-two thousand, eight hundred sixty-one".