1290821359 has 2 divisors, whose sum is σ = 1290821360. Its totient is φ = 1290821358.

The previous prime is 1290821351. The next prime is 1290821377. The reversal of 1290821359 is 9531280921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1290821359 - 2³ = 1290821351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290821351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645410679 + 645410680.

It is an arithmetic number, because the mean of its divisors is an integer number (645410680).

Almost surely, 2^1290821359 is an apocalyptic number.

1290821359 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290821359 is an equidigital number, since it uses as much as digits as its factorization.

1290821359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1290821359 is about 35928.0024354263. The cubic root of 1290821359 is about 1088.8182234329.

It can be divided in two parts, 1290 and 821359, that added together give a square (822649 = 907²).

The spelling of 1290821359 in words is "one billion, two hundred ninety million, eight hundred twenty-one thousand, three hundred fifty-nine".