1242181037 has 2 divisors, whose sum is σ = 1242181038. Its totient is φ = 1242181036.

The previous prime is 1242180991. The next prime is 1242181043. The reversal of 1242181037 is 7301812421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1235452201 + 6728836 = 35149^2 + 2594^2 .

It is an emirp because it is prime and its reverse (7301812421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242181037 - 2¹² = 1242176941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242181097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621090518 + 621090519.

It is an arithmetic number, because the mean of its divisors is an integer number (621090519).

Almost surely, 2^1242181037 is an apocalyptic number.

It is an amenable number.

1242181037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242181037 is an equidigital number, since it uses as much as digits as its factorization.

1242181037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1242181037 is about 35244.5887619646. The cubic root of 1242181037 is about 1074.9665861617.

Adding to 1242181037 its reverse (7301812421), we get a palindrome (8543993458).

The spelling of 1242181037 in words is "one billion, two hundred forty-two million, one hundred eighty-one thousand, thirty-seven".