1242131017 has 2 divisors, whose sum is σ = 1242131018. Its totient is φ = 1242131016.

The previous prime is 1242131003. The next prime is 1242131053. The reversal of 1242131017 is 7101312421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241082441 + 1048576 = 35229^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242131017 - 2¹¹ = 1242128969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242131417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621065508 + 621065509.

It is an arithmetic number, because the mean of its divisors is an integer number (621065509).

Almost surely, 2^1242131017 is an apocalyptic number.

It is an amenable number.

1242131017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242131017 is an equidigital number, since it uses as much as digits as its factorization.

1242131017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1242131017 is about 35243.8791423419. The cubic root of 1242131017 is about 1074.9521570920.

Adding to 1242131017 its reverse (7101312421), we get a palindrome (8343443438).

The spelling of 1242131017 in words is "one billion, two hundred forty-two million, one hundred thirty-one thousand, seventeen".