1242212437 has 2 divisors, whose sum is σ = 1242212438. Its totient is φ = 1242212436.

The previous prime is 1242212431. The next prime is 1242212441. The reversal of 1242212437 is 7342122421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236647556 + 5564881 = 35166^2 + 2359^2 .

It is an emirp because it is prime and its reverse (7342122421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242212437 - 2³ = 1242212429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242212431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621106218 + 621106219.

It is an arithmetic number, because the mean of its divisors is an integer number (621106219).

Almost surely, 2^1242212437 is an apocalyptic number.

It is an amenable number.

1242212437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242212437 is an equidigital number, since it uses as much as digits as its factorization.

1242212437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 1242212437 is about 35245.0342176029. The cubic root of 1242212437 is about 1074.9756437965.

Adding to 1242212437 its reverse (7342122421), we get a palindrome (8584334858).

The spelling of 1242212437 in words is "one billion, two hundred forty-two million, two hundred twelve thousand, four hundred thirty-seven".