1421146789 has 2 divisors, whose sum is σ = 1421146790. Its totient is φ = 1421146788.

The previous prime is 1421146763. The next prime is 1421146799. The reversal of 1421146789 is 9876411241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925193889 + 495952900 = 30417^2 + 22270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421146789 - 2⁵ = 1421146757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421146729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710573394 + 710573395.

It is an arithmetic number, because the mean of its divisors is an integer number (710573395).

Almost surely, 2^1421146789 is an apocalyptic number.

It is an amenable number.

1421146789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421146789 is an equidigital number, since it uses as much as digits as its factorization.

1421146789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 1421146789 is about 37698.1006020197. The cubic root of 1421146789 is about 1124.2933607463.

The spelling of 1421146789 in words is "one billion, four hundred twenty-one million, one hundred forty-six thousand, seven hundred eighty-nine".