1221171674 has 16 divisors (see below), whose sum is σ = 1841555400. Its totient is φ = 607328064.

The previous prime is 1221171673. The next prime is 1221171689. The reversal of 1221171674 is 4761711221.

It can be written as a sum of positive squares in 4 ways, for example, as 410346049 + 810825625 = 20257^2 + 28475^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221171674.

It is not an unprimeable number, because it can be changed into a prime (1221171673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391232 + ... + 394340.

Almost surely, 2^1221171674 is an apocalyptic number.

1221171674 is a deficient number, since it is larger than the sum of its proper divisors (620383726).

1221171674 is a wasteful number, since it uses less digits than its factorization.

1221171674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097.

The product of its digits is 4704, while the sum is 32.

The square root of 1221171674 is about 34945.2668325769. The cubic root of 1221171674 is about 1068.8716885982.

Adding to 1221171674 its reverse (4761711221), we get a palindrome (5982882895).

The spelling of 1221171674 in words is "one billion, two hundred twenty-one million, one hundred seventy-one thousand, six hundred seventy-four".