2221942 has 4 divisors (see below), whose sum is σ = 3332916. Its totient is φ = 1110970.

The previous prime is 2221931. The next prime is 2221943. The reversal of 2221942 is 2491222.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221943) 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 as a sum of consecutive naturals, namely, 555484 + ... + 555487.

It is an arithmetic number, because the mean of its divisors is an integer number (833229).

2^2221942 is an apocalyptic number.

2221942 is a deficient number, since it is larger than the sum of its proper divisors (1110974).

2221942 is a wasteful number, since it uses less digits than its factorization.

2221942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110973.

The product of its digits is 576, while the sum is 22.

The square root of 2221942 is about 1490.6179926460. The cubic root of 2221942 is about 130.4901026438.

The spelling of 2221942 in words is "two million, two hundred twenty-one thousand, nine hundred forty-two".