1242965533 has 2 divisors, whose sum is σ = 1242965534. Its totient is φ = 1242965532.

The previous prime is 1242965501. The next prime is 1242965551. The reversal of 1242965533 is 3355692421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750924409 + 492041124 = 27403^2 + 22182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242965533 - 2⁵ = 1242965501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242965033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621482766 + 621482767.

It is an arithmetic number, because the mean of its divisors is an integer number (621482767).

Almost surely, 2^1242965533 is an apocalyptic number.

It is an amenable number.

1242965533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242965533 is an equidigital number, since it uses as much as digits as its factorization.

1242965533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 1242965533 is about 35255.7163166486. The cubic root of 1242965533 is about 1075.1928359312.

The spelling of 1242965533 in words is "one billion, two hundred forty-two million, nine hundred sixty-five thousand, five hundred thirty-three".