1242313511 has 2 divisors, whose sum is σ = 1242313512. Its totient is φ = 1242313510.

The previous prime is 1242313507. The next prime is 1242313529. The reversal of 1242313511 is 1153132421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242313511 - 2² = 1242313507 is a prime.

It is a super-2 number, since 2×1242313511² = 3086685719226294242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242313411) 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 as a sum of consecutive naturals, namely, 621156755 + 621156756.

It is an arithmetic number, because the mean of its divisors is an integer number (621156756).

Almost surely, 2^1242313511 is an apocalyptic number.

1242313511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242313511 is an equidigital number, since it uses as much as digits as its factorization.

1242313511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 1242313511 is about 35246.4680641905. The cubic root of 1242313511 is about 1075.0047985364.

Adding to 1242313511 its reverse (1153132421), we get a palindrome (2395445932).

The spelling of 1242313511 in words is "one billion, two hundred forty-two million, three hundred thirteen thousand, five hundred eleven".