1421302991 has 2 divisors, whose sum is σ = 1421302992. Its totient is φ = 1421302990.

The previous prime is 1421302957. The next prime is 1421303011. The reversal of 1421302991 is 1992031241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421302991 - 2¹⁰ = 1421301967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421302931) 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, 710651495 + 710651496.

It is an arithmetic number, because the mean of its divisors is an integer number (710651496).

Almost surely, 2^1421302991 is an apocalyptic number.

1421302991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421302991 is an equidigital number, since it uses as much as digits as its factorization.

1421302991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1421302991 is about 37700.1722940360. The cubic root of 1421302991 is about 1124.3345505889.

The spelling of 1421302991 in words is "one billion, four hundred twenty-one million, three hundred two thousand, nine hundred ninety-one".