1242663293 has 2 divisors, whose sum is σ = 1242663294. Its totient is φ = 1242663292.

The previous prime is 1242663187. The next prime is 1242663307. The reversal of 1242663293 is 3923662421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1219266724 + 23396569 = 34918^2 + 4837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242663293 - 2¹⁰ = 1242662269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242663893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621331646 + 621331647.

It is an arithmetic number, because the mean of its divisors is an integer number (621331647).

Almost surely, 2^1242663293 is an apocalyptic number.

It is an amenable number.

1242663293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242663293 is an equidigital number, since it uses as much as digits as its factorization.

1242663293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The square root of 1242663293 is about 35251.4296589514. The cubic root of 1242663293 is about 1075.1056807588.

The spelling of 1242663293 in words is "one billion, two hundred forty-two million, six hundred sixty-three thousand, two hundred ninety-three".