7801222 has 16 divisors (see below), whose sum is σ = 13748112. Its totient is φ = 3273120.

The previous prime is 7801219. The next prime is 7801223. The reversal of 7801222 is 2221087.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 7801193 and 7801202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7801223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13353 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (859257).

Almost surely, 2^7801222 is an apocalyptic number.

7801222 is a deficient number, since it is larger than the sum of its proper divisors (5946890).

7801222 is a wasteful number, since it uses less digits than its factorization.

7801222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27303.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 7801222 is about 2793.0667732799. The cubic root of 7801222 is about 198.3296043991.

It can be divided in two parts, 780 and 1222, that added together give a palindrome (2002).

The spelling of 7801222 in words is "seven million, eight hundred one thousand, two hundred twenty-two".