1421099 has 2 divisors, whose sum is σ = 1421100. Its totient is φ = 1421098.

The previous prime is 1421093. The next prime is 1421113. The reversal of 1421099 is 9901241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421099 - 2⁴ = 1421083 is a prime.

It is a Sophie Germain prime.

It is equal to p₁₀₈₅₆₆ and since 1421099 and 108566 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1421093) 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, 710549 + 710550.

It is an arithmetic number, because the mean of its divisors is an integer number (710550).

2^1421099 is an apocalyptic number.

1421099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421099 is an equidigital number, since it uses as much as digits as its factorization.

1421099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1421099 is about 1192.0985697500. The cubic root of 1421099 is about 112.4280758375.

The spelling of 1421099 in words is "one million, four hundred twenty-one thousand, ninety-nine".