4992221 has 4 divisors (see below), whose sum is σ = 5376252. Its totient is φ = 4608192.

The previous prime is 4992187. The next prime is 4992233. The reversal of 4992221 is 1222994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222994 = 2 ⋅611497.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 4020025 = 986^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 4992221 - 2⁶ = 4992157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4992241) 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, 191996 + ... + 192021.

It is an arithmetic number, because the mean of its divisors is an integer number (1344063).

Almost surely, 2^4992221 is an apocalyptic number.

It is an amenable number.

4992221 is a deficient number, since it is larger than the sum of its proper divisors (384031).

4992221 is a wasteful number, since it uses less digits than its factorization.

4992221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384030.

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

The square root of 4992221 is about 2234.3278631392. The cubic root of 4992221 is about 170.9088692862.

The spelling of 4992221 in words is "four million, nine hundred ninety-two thousand, two hundred twenty-one".