1321404052 has 12 divisors (see below), whose sum is σ = 2318760640. Its totient is φ = 658901016.

The previous prime is 1321404043. The next prime is 1321404079. The reversal of 1321404052 is 2504041231.

It is a super-2 number, since 2×1321404052² = 3492217337284037408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 448602 + ... + 451537.

Almost surely, 2^1321404052 is an apocalyptic number.

It is an amenable number.

1321404052 is a deficient number, since it is larger than the sum of its proper divisors (997356588).

1321404052 is a wasteful number, since it uses less digits than its factorization.

1321404052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900510 (or 900508 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1321404052 is about 36351.1217433520. The cubic root of 1321404052 is about 1097.3501097180.

Adding to 1321404052 its reverse (2504041231), we get a palindrome (3825445283).

The spelling of 1321404052 in words is "one billion, three hundred twenty-one million, four hundred four thousand, fifty-two".