1242344231 has 2 divisors, whose sum is σ = 1242344232. Its totient is φ = 1242344230.

The previous prime is 1242344183. The next prime is 1242344237. The reversal of 1242344231 is 1324432421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242344231 - 2¹⁴ = 1242327847 is a prime.

It is a super-2 number, since 2×1242344231² = 3086838376597962722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242344231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242344237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621172115 + 621172116.

It is an arithmetic number, because the mean of its divisors is an integer number (621172116).

Almost surely, 2^1242344231 is an apocalyptic number.

1242344231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242344231 is an equidigital number, since it uses as much as digits as its factorization.

1242344231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 26.

The square root of 1242344231 is about 35246.9038498419. The cubic root of 1242344231 is about 1075.0136593902.

Adding to 1242344231 its reverse (1324432421), we get a palindrome (2566776652).

The spelling of 1242344231 in words is "one billion, two hundred forty-two million, three hundred forty-four thousand, two hundred thirty-one".