1421705676609 has 27 divisors (see below), whose sum is σ = 2122121650467. Its totient is φ = 917157927600.

The previous prime is 1421705676563. The next prime is 1421705676613. The reversal of 1421705676609 is 9066765071241.

The square root of 1421705676609 is 1192353.

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

1421705676609 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 70 + 567 + 6 + 6 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 78934588209 + 1342771088400 = 280953^2 + 1158780^2 .

It is not a de Polignac number, because 1421705676609 - 2⁷ = 1421705676481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421705675609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 110882419 + ... + 110895239.

Almost surely, 2^{1421705676609} is an apocalyptic number.

1421705676609 is the 1192353-rd square number.

1421705676609 is the 596177-th centered octagonal number.

It is an amenable number.

1421705676609 is a deficient number, since it is larger than the sum of its proper divisors (700415973858).

1421705676609 is an frugal number, since it uses more digits than its factorization.

1421705676609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25710 (or 12855 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 1421705676609 in words is "one trillion, four hundred twenty-one billion, seven hundred five million, six hundred seventy-six thousand, six hundred nine".