4221992 has 8 divisors (see below), whose sum is σ = 7916250. Its totient is φ = 2110992.

The previous prime is 4221989. The next prime is 4222003. The reversal of 4221992 is 2991224.

It can be written as a sum of positive squares in only one way, i.e., 3740356 + 481636 = 1934^2 + 694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 263867 + ... + 263882.

Almost surely, 2^4221992 is an apocalyptic number.

It is an amenable number.

4221992 is a deficient number, since it is larger than the sum of its proper divisors (3694258).

4221992 is a wasteful number, since it uses less digits than its factorization.

4221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527755 (or 527751 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 4221992 is about 2054.7486464286. The cubic root of 4221992 is about 161.6239818345.

The spelling of 4221992 in words is "four million, two hundred twenty-one thousand, nine hundred ninety-two".