1321166452 has 12 divisors (see below), whose sum is σ = 2368432836. Its totient is φ = 644471360.

The previous prime is 1321166449. The next prime is 1321166453. The reversal of 1321166452 is 2546611231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 352463076 + 968703376 = 18774^2 + 31124^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321166453) 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 3 ways as a sum of consecutive naturals, for example, 4027783 + ... + 4028110.

It is an arithmetic number, because the mean of its divisors is an integer number (197369403).

Almost surely, 2^1321166452 is an apocalyptic number.

It is an amenable number.

1321166452 is a deficient number, since it is larger than the sum of its proper divisors (1047266384).

1321166452 is a wasteful number, since it uses less digits than its factorization.

1321166452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8055938 (or 8055936 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1321166452 is about 36347.8534716976. The cubic root of 1321166452 is about 1097.2843347280.

Adding to 1321166452 its reverse (2546611231), we get a palindrome (3867777683).

The spelling of 1321166452 in words is "one billion, three hundred twenty-one million, one hundred sixty-six thousand, four hundred fifty-two".