673421121 has 20 divisors (see below), whose sum is σ = 1006720000. Its totient is φ = 448614936.

The previous prime is 673421083. The next prime is 673421129. The reversal of 673421121 is 121124376.

It is not a de Polignac number, because 673421121 - 2¹¹ = 673419073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673421129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 159840 + ... + 163998.

It is an arithmetic number, because the mean of its divisors is an integer number (50336000).

Almost surely, 2^673421121 is an apocalyptic number.

It is an amenable number.

673421121 is a deficient number, since it is larger than the sum of its proper divisors (333298879).

673421121 is a wasteful number, since it uses less digits than its factorization.

673421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170 (or 6161 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 673421121 is about 25950.3587836469. The cubic root of 673421121 is about 876.5208363565.

Adding to 673421121 its reverse (121124376), we get a palindrome (794545497).

The spelling of 673421121 in words is "six hundred seventy-three million, four hundred twenty-one thousand, one hundred twenty-one".