1242012137 has 2 divisors, whose sum is σ = 1242012138. Its totient is φ = 1242012136.

The previous prime is 1242012097. The next prime is 1242012143. The reversal of 1242012137 is 7312102421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1122853081 + 119159056 = 33509^2 + 10916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242012137 - 2³⁰ = 168270313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242012637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621006068 + 621006069.

It is an arithmetic number, because the mean of its divisors is an integer number (621006069).

Almost surely, 2^1242012137 is an apocalyptic number.

It is an amenable number.

1242012137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242012137 is an equidigital number, since it uses as much as digits as its factorization.

1242012137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1242012137 is about 35242.1925680001. The cubic root of 1242012137 is about 1074.9178626985.

Adding to 1242012137 its reverse (7312102421), we get a palindrome (8554114558).

The spelling of 1242012137 in words is "one billion, two hundred forty-two million, twelve thousand, one hundred thirty-seven".