2221072 has 30 divisors (see below), whose sum is σ = 5007678. Its totient is φ = 951552.

The previous prime is 2221069. The next prime is 2221097. The reversal of 2221072 is 2701222.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 414736 = 1344^2 + 644^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 633 + ... + 2200.

2^2221072 is an apocalyptic number.

It is an amenable number.

2221072 is an abundant number, since it is smaller than the sum of its proper divisors (2786606).

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

2221072 is a wasteful number, since it uses less digits than its factorization.

2221072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2221072 is about 1490.3261388032. The cubic root of 2221072 is about 130.4730693145.

Adding to 2221072 its reverse (2701222), we get a palindrome (4922294).

The spelling of 2221072 in words is "two million, two hundred twenty-one thousand, seventy-two".