1421673617 has 16 divisors (see below), whose sum is σ = 1779415680. Its totient is φ = 1105771392.

The previous prime is 1421673601. The next prime is 1421673703. The reversal of 1421673617 is 7163761241.

It is not a de Polignac number, because 1421673617 - 2⁴ = 1421673601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421673017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127028 + ... + 137765.

It is an arithmetic number, because the mean of its divisors is an integer number (111213480).

Almost surely, 2^1421673617 is an apocalyptic number.

It is an amenable number.

1421673617 is a deficient number, since it is larger than the sum of its proper divisors (357742063).

1421673617 is a wasteful number, since it uses less digits than its factorization.

1421673617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264872.

The product of its digits is 42336, while the sum is 38.

The square root of 1421673617 is about 37705.0874153608. The cubic root of 1421673617 is about 1124.4322711088.

The spelling of 1421673617 in words is "one billion, four hundred twenty-one million, six hundred seventy-three thousand, six hundred seventeen".