2221842 has 16 divisors (see below), whose sum is σ = 5078592. Its totient is φ = 634800.

The previous prime is 2221837. The next prime is 2221847. The reversal of 2221842 is 2481222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2221837) and next prime (2221847).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2221847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26409 + ... + 26492.

It is an arithmetic number, because the mean of its divisors is an integer number (317412).

2^2221842 is an apocalyptic number.

2221842 is an abundant number, since it is smaller than the sum of its proper divisors (2856750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221842 is a wasteful number, since it uses less digits than its factorization.

2221842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52913.

The product of its digits is 512, while the sum is 21.

The square root of 2221842 is about 1490.5844491340. The cubic root of 2221842 is about 130.4881450161.

It can be divided in two parts, 22218 and 42, that multiplied together give a square (933156 = 966²).

The spelling of 2221842 in words is "two million, two hundred twenty-one thousand, eight hundred forty-two".