1420666134889 has 27 divisors (see below), whose sum is σ = 1485273807927. Its totient is φ = 1358842592016.

The previous prime is 1420666134887. The next prime is 1420666134911. The reversal of 1420666134889 is 9884316660241.

The square root of 1420666134889 is 1191917.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1024154120025 + 396512014864 = 1012005^2 + 629692^2 .

It is not a de Polignac number, because 1420666134889 - 2¹ = 1420666134887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420666134887) 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 in 26 ways as a sum of consecutive naturals, for example, 2716378582 + ... + 2716379104.

Almost surely, 2^{1420666134889} is an apocalyptic number.

1420666134889 is the 1191917-th square number.

1420666134889 is the 595959-th centered octagonal number.

It is an amenable number.

1420666134889 is a deficient number, since it is larger than the sum of its proper divisors (64607673038).

1420666134889 is an frugal number, since it uses more digits than its factorization.

1420666134889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 58.

The spelling of 1420666134889 in words is "one trillion, four hundred twenty billion, six hundred sixty-six million, one hundred thirty-four thousand, eight hundred eighty-nine".