1231441243 has 4 divisors (see below), whose sum is σ = 1296253960. Its totient is φ = 1166628528.

The previous prime is 1231441231. The next prime is 1231441249. The reversal of 1231441243 is 3421441321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3421441321 = 19 ⋅180075859.

It is a cyclic number.

It is not a de Polignac number, because 1231441243 - 2⁹ = 1231440731 is a prime.

It is a super-2 number, since 2×1231441243² = 3032895069922770098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231441249) 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, 32406330 + ... + 32406367.

It is an arithmetic number, because the mean of its divisors is an integer number (324063490).

Almost surely, 2^1231441243 is an apocalyptic number.

1231441243 is a deficient number, since it is larger than the sum of its proper divisors (64812717).

1231441243 is an equidigital number, since it uses as much as digits as its factorization.

1231441243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64812716.

The product of its digits is 2304, while the sum is 25.

The square root of 1231441243 is about 35091.8971131513. The cubic root of 1231441243 is about 1071.8595906893.

Adding to 1231441243 its reverse (3421441321), we get a palindrome (4652882564).

The spelling of 1231441243 in words is "one billion, two hundred thirty-one million, four hundred forty-one thousand, two hundred forty-three".