1421415169985 has 4 divisors (see below), whose sum is σ = 1705698203988. Its totient is φ = 1137132135984.

The previous prime is 1421415169961. The next prime is 1421415169987. The reversal of 1421415169985 is 5899615141241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 867118540864 + 554296629121 = 931192^2 + 744511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421415169985 - 2¹⁰ = 1421415168961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421415169985.

It is not an unprimeable number, because it can be changed into a prime (1421415169987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142141516994 + ... + 142141517003.

It is an arithmetic number, because the mean of its divisors is an integer number (426424550997).

Almost surely, 2^{1421415169985} is an apocalyptic number.

It is an amenable number.

1421415169985 is a deficient number, since it is larger than the sum of its proper divisors (284283034003).

1421415169985 is an equidigital number, since it uses as much as digits as its factorization.

1421415169985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284283034002.

The product of its digits is 3110400, while the sum is 56.

The spelling of 1421415169985 in words is "one trillion, four hundred twenty-one billion, four hundred fifteen million, one hundred sixty-nine thousand, nine hundred eighty-five".