1242852791 has 2 divisors, whose sum is σ = 1242852792. Its totient is φ = 1242852790.

The previous prime is 1242852781. The next prime is 1242852823. The reversal of 1242852791 is 1972582421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242852791 - 2¹⁰ = 1242851767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242852781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621426395 + 621426396.

It is an arithmetic number, because the mean of its divisors is an integer number (621426396).

Almost surely, 2^1242852791 is an apocalyptic number.

1242852791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242852791 is an equidigital number, since it uses as much as digits as its factorization.

1242852791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 1242852791 is about 35254.1173623734. The cubic root of 1242852791 is about 1075.1603268356.

The spelling of 1242852791 in words is "one billion, two hundred forty-two million, eight hundred fifty-two thousand, seven hundred ninety-one".