1672341221 has 16 divisors (see below), whose sum is σ = 1924047360. Its totient is φ = 1443018240.

The previous prime is 1672341217. The next prime is 1672341257. The reversal of 1672341221 is 1221432761.

It is a cyclic number.

It is not a de Polignac number, because 1672341221 - 2² = 1672341217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672341721) 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 15 ways as a sum of consecutive naturals, for example, 73496 + ... + 93521.

It is an arithmetic number, because the mean of its divisors is an integer number (120252960).

Almost surely, 2^1672341221 is an apocalyptic number.

It is an amenable number.

1672341221 is a deficient number, since it is larger than the sum of its proper divisors (251706139).

1672341221 is a wasteful number, since it uses less digits than its factorization.

1672341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167084.

The product of its digits is 4032, while the sum is 29.

The square root of 1672341221 is about 40894.2688038312. The cubic root of 1672341221 is about 1186.9751628799.

Adding to 1672341221 its reverse (1221432761), we get a palindrome (2893773982).

The spelling of 1672341221 in words is "one billion, six hundred seventy-two million, three hundred forty-one thousand, two hundred twenty-one".