1421065999 has 2 divisors, whose sum is σ = 1421066000. Its totient is φ = 1421065998.

The previous prime is 1421065973. The next prime is 1421066029. The reversal of 1421065999 is 9995601241.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421065999 - 2⁵ = 1421065967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421065909) 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, 710532999 + 710533000.

It is an arithmetic number, because the mean of its divisors is an integer number (710533000).

Almost surely, 2^1421065999 is an apocalyptic number.

1421065999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421065999 is an equidigital number, since it uses as much as digits as its factorization.

1421065999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 1421065999 is about 37697.0290473931. The cubic root of 1421065999 is about 1124.2720555622.

The spelling of 1421065999 in words is "one billion, four hundred twenty-one million, sixty-five thousand, nine hundred ninety-nine".