2992221 has 40 divisors (see below), whose sum is σ = 4939704. Its totient is φ = 1797120.

The previous prime is 2992219. The next prime is 2992229. The reversal of 2992221 is 1222992.

It can be written as a sum of positive squares in 4 ways, for example, as 396900 + 2595321 = 630^2 + 1611^2 .

It is not a de Polignac number, because 2992221 - 2¹ = 2992219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2992229) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56431 + ... + 56483.

2^2992221 is an apocalyptic number.

It is an amenable number.

2992221 is a deficient number, since it is larger than the sum of its proper divisors (1947483).

2992221 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (2992220) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (123).

2992221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 114 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2992221 is about 1729.8037460938. The cubic root of 2992221 is about 144.1001906910.

The spelling of 2992221 in words is "two million, nine hundred ninety-two thousand, two hundred twenty-one".