1242676517 has 2 divisors, whose sum is σ = 1242676518. Its totient is φ = 1242676516.

The previous prime is 1242676511. The next prime is 1242676529. The reversal of 1242676517 is 7156762421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155048196 + 87628321 = 33986^2 + 9361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242676517 - 2¹² = 1242672421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242676511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621338258 + 621338259.

It is an arithmetic number, because the mean of its divisors is an integer number (621338259).

Almost surely, 2^1242676517 is an apocalyptic number.

It is an amenable number.

1242676517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242676517 is an equidigital number, since it uses as much as digits as its factorization.

1242676517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 1242676517 is about 35251.6172253132. The cubic root of 1242676517 is about 1075.1094943816.

The spelling of 1242676517 in words is "one billion, two hundred forty-two million, six hundred seventy-six thousand, five hundred seventeen".