2821972 has 6 divisors (see below), whose sum is σ = 4938458. Its totient is φ = 1410984.

The previous prime is 2821969. The next prime is 2821979. The reversal of 2821972 is 2791282.

2821972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2808976 + 12996 = 1676^2 + 114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821979) 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 as a sum of consecutive naturals, namely, 352743 + ... + 352750.

2^2821972 is an apocalyptic number.

It is an amenable number.

2821972 is a deficient number, since it is larger than the sum of its proper divisors (2116486).

2821972 is a wasteful number, since it uses less digits than its factorization.

2821972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705497 (or 705495 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 2821972 is about 1679.8726142181. The cubic root of 2821972 is about 141.3136888760.

The spelling of 2821972 in words is "two million, eight hundred twenty-one thousand, nine hundred seventy-two".