1421971583729 has 2 divisors, whose sum is σ = 1421971583730. Its totient is φ = 1421971583728.

The previous prime is 1421971583707. The next prime is 1421971583731. The reversal of 1421971583729 is 9273851791241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1385627974129 + 36343609600 = 1177127^2 + 190640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421971583729 - 2²⁸ = 1421703148273 is a prime.

Together with 1421971583731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1421971583789) 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, 710985791864 + 710985791865.

It is an arithmetic number, because the mean of its divisors is an integer number (710985791865).

Almost surely, 2^{1421971583729} is an apocalyptic number.

It is an amenable number.

1421971583729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421971583729 is an equidigital number, since it uses as much as digits as its factorization.

1421971583729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 59.

The spelling of 1421971583729 in words is "one trillion, four hundred twenty-one billion, nine hundred seventy-one million, five hundred eighty-three thousand, seven hundred twenty-nine".