1224005131 has 4 divisors (see below), whose sum is σ = 1224408064. Its totient is φ = 1223602200.

The previous prime is 1224005119. The next prime is 1224005141. The reversal of 1224005131 is 1315004221.

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

It is a cyclic number.

It is not a de Polignac number, because 1224005131 - 2¹⁵ = 1223972363 is a prime.

It is a super-2 number, since 2×1224005131² = 2996377121428654322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224005099 and 1224005108.

It is not an unprimeable number, because it can be changed into a prime (1224005141) 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, 196875 + ... + 202996.

It is an arithmetic number, because the mean of its divisors is an integer number (306102016).

Almost surely, 2^1224005131 is an apocalyptic number.

1224005131 is a deficient number, since it is larger than the sum of its proper divisors (402933).

1224005131 is an equidigital number, since it uses as much as digits as its factorization.

1224005131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402932.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1224005131 is about 34985.7846989317. The cubic root of 1224005131 is about 1069.6977429657.

Adding to 1224005131 its reverse (1315004221), we get a palindrome (2539009352).

The spelling of 1224005131 in words is "one billion, two hundred twenty-four million, five thousand, one hundred thirty-one".