1242041231 has 2 divisors, whose sum is σ = 1242041232. Its totient is φ = 1242041230.

The previous prime is 1242041219. The next prime is 1242041263. The reversal of 1242041231 is 1321402421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1321402421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242041231 - 2¹⁸ = 1241779087 is a prime.

It is a super-2 number, since 2×1242041231² = 3085332839007990722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242041431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621020615 + 621020616.

It is an arithmetic number, because the mean of its divisors is an integer number (621020616).

Almost surely, 2^1242041231 is an apocalyptic number.

1242041231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242041231 is an equidigital number, since it uses as much as digits as its factorization.

1242041231 is an evil number, because the sum of its binary digits is even.

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

The square root of 1242041231 is about 35242.6053378578. The cubic root of 1242041231 is about 1074.9262559112.

Adding to 1242041231 its reverse (1321402421), we get a palindrome (2563443652).

The spelling of 1242041231 in words is "one billion, two hundred forty-two million, forty-one thousand, two hundred thirty-one".