1212742523 has 2 divisors, whose sum is σ = 1212742524. Its totient is φ = 1212742522.

The previous prime is 1212742513. The next prime is 1212742541. The reversal of 1212742523 is 3252472121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3252472121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212742523 - 2¹⁰ = 1212741499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212742513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606371261 + 606371262.

It is an arithmetic number, because the mean of its divisors is an integer number (606371262).

Almost surely, 2^1212742523 is an apocalyptic number.

1212742523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212742523 is an equidigital number, since it uses as much as digits as its factorization.

1212742523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 29.

The square root of 1212742523 is about 34824.4529461699. The cubic root of 1212742523 is about 1066.4067087970.

The spelling of 1212742523 in words is "one billion, two hundred twelve million, seven hundred forty-two thousand, five hundred twenty-three".