1242412517 has 2 divisors, whose sum is σ = 1242412518. Its totient is φ = 1242412516.

The previous prime is 1242412427. The next prime is 1242412531. The reversal of 1242412517 is 7152142421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1234397956 + 8014561 = 35134^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242412517 - 2¹⁶ = 1242346981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242412517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242412537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621206258 + 621206259.

It is an arithmetic number, because the mean of its divisors is an integer number (621206259).

Almost surely, 2^1242412517 is an apocalyptic number.

It is an amenable number.

1242412517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242412517 is an equidigital number, since it uses as much as digits as its factorization.

1242412517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 1242412517 is about 35247.8725173591. The cubic root of 1242412517 is about 1075.0333552297.

Adding to 1242412517 its reverse (7152142421), we get a palindrome (8394554938).

The spelling of 1242412517 in words is "one billion, two hundred forty-two million, four hundred twelve thousand, five hundred seventeen".