22124261 has 8 divisors (see below), whose sum is σ = 22781304. Its totient is φ = 21470400.

The previous prime is 22124251. The next prime is 22124269. The reversal of 22124261 is 16242122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6076225 + 16048036 = 2465^2 + 4006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22124261 - 2¹⁰ = 22123237 is a prime.

It is a super-2 number, since 2×22124261² = 978965849592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22124269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25511 + ... + 26363.

It is an arithmetic number, because the mean of its divisors is an integer number (2847663).

Almost surely, 2^22124261 is an apocalyptic number.

It is an amenable number.

22124261 is a deficient number, since it is larger than the sum of its proper divisors (657043).

22124261 is an equidigital number, since it uses as much as digits as its factorization.

22124261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591.

The product of its digits is 384, while the sum is 20.

The square root of 22124261 is about 4703.6433750870. The cubic root of 22124261 is about 280.7304947586.

Adding to 22124261 its reverse (16242122), we get a palindrome (38366383).

The spelling of 22124261 in words is "twenty-two million, one hundred twenty-four thousand, two hundred sixty-one".