1173408221 has 4 divisors (see below), whose sum is σ = 1242432252. Its totient is φ = 1104384192.

The previous prime is 1173408193. The next prime is 1173408259. The reversal of 1173408221 is 1228043711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 319015321 + 854392900 = 17861^2 + 29230^2 .

It is not a de Polignac number, because 1173408221 - 2²⁶ = 1106299357 is a prime.

It is a super-2 number, since 2×1173408221² = 2753773706220769682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173438221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34511990 + ... + 34512023.

It is an arithmetic number, because the mean of its divisors is an integer number (310608063).

Almost surely, 2^1173408221 is an apocalyptic number.

It is an amenable number.

1173408221 is a deficient number, since it is larger than the sum of its proper divisors (69024031).

1173408221 is an equidigital number, since it uses as much as digits as its factorization.

1173408221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69024030.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1173408221 is about 34255.0466500923. The cubic root of 1173408221 is about 1054.7504245560.

The spelling of 1173408221 in words is "one billion, one hundred seventy-three million, four hundred eight thousand, two hundred twenty-one".