2221742 has 8 divisors (see below), whose sum is σ = 3387432. Its totient is φ = 1092600.

The previous prime is 2221741. The next prime is 2221753. The reversal of 2221742 is 2471222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2221742² = 9872275029128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8984 + ... + 9227.

It is an arithmetic number, because the mean of its divisors is an integer number (423429).

2^2221742 is an apocalyptic number.

2221742 is a deficient number, since it is larger than the sum of its proper divisors (1165690).

2221742 is a wasteful number, since it uses less digits than its factorization.

2221742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18274.

The product of its digits is 448, while the sum is 20.

The square root of 2221742 is about 1490.5509048671. The cubic root of 2221742 is about 130.4861873296.

Adding to 2221742 its reverse (2471222), we get a palindrome (4692964).

The spelling of 2221742 in words is "two million, two hundred twenty-one thousand, seven hundred forty-two".