1329874121 has 2 divisors, whose sum is σ = 1329874122. Its totient is φ = 1329874120.

The previous prime is 1329874111. The next prime is 1329874127. The reversal of 1329874121 is 1214789231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1139737600 + 190136521 = 33760^2 + 13789^2 .

It is an emirp because it is prime and its reverse (1214789231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329874121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1329874127) 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 as a sum of consecutive naturals, namely, 664937060 + 664937061.

It is an arithmetic number, because the mean of its divisors is an integer number (664937061).

Almost surely, 2^1329874121 is an apocalyptic number.

It is an amenable number.

1329874121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329874121 is an equidigital number, since it uses as much as digits as its factorization.

1329874121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 1329874121 is about 36467.4391889532. The cubic root of 1329874121 is about 1099.6897530012.

The spelling of 1329874121 in words is "one billion, three hundred twenty-nine million, eight hundred seventy-four thousand, one hundred twenty-one".