4722181 has 4 divisors (see below), whose sum is σ = 4732972. Its totient is φ = 4711392.

The previous prime is 4722173. The next prime is 4722187. The reversal of 4722181 is 1812274.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3802500 + 919681 = 1950^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 4722181 - 2³ = 4722173 is a prime.

It is a super-2 number, since 2×4722181² = 44597986793522, which contains 22 as substring.

It is a Duffinian number.

4722181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4722187) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4710 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (1183243).

Almost surely, 2^4722181 is an apocalyptic number.

It is an amenable number.

4722181 is a deficient number, since it is larger than the sum of its proper divisors (10791).

4722181 is a wasteful number, since it uses less digits than its factorization.

4722181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10790.

The product of its digits is 896, while the sum is 25.

The square root of 4722181 is about 2173.0579835798. The cubic root of 4722181 is about 167.7699634128.

The spelling of 4722181 in words is "four million, seven hundred twenty-two thousand, one hundred eighty-one".