1421146729 has 2 divisors, whose sum is σ = 1421146730. Its totient is φ = 1421146728.

The previous prime is 1421146697. The next prime is 1421146751. The reversal of 1421146729 is 9276411241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1367520400 + 53626329 = 36980^2 + 7323^2 .

It is an emirp because it is prime and its reverse (9276411241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421146729 - 2⁵ = 1421146697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421146789) 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, 710573364 + 710573365.

It is an arithmetic number, because the mean of its divisors is an integer number (710573365).

Almost surely, 2^1421146729 is an apocalyptic number.

It is an amenable number.

1421146729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421146729 is an equidigital number, since it uses as much as digits as its factorization.

1421146729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 1421146729 is about 37698.0998062237. The cubic root of 1421146729 is about 1124.2933449240.

The spelling of 1421146729 in words is "one billion, four hundred twenty-one million, one hundred forty-six thousand, seven hundred twenty-nine".