1321204052 has 36 divisors (see below), whose sum is σ = 2695763700. Its totient is φ = 564931584.

The previous prime is 1321204039. The next prime is 1321204057. The reversal of 1321204052 is 2504021231.

It can be written as a sum of positive squares in 2 ways, for example, as 888397636 + 432806416 = 29806^2 + 20804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321204057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80498 + ... + 95510.

It is an arithmetic number, because the mean of its divisors is an integer number (74882325).

Almost surely, 2^1321204052 is an apocalyptic number.

It is an amenable number.

1321204052 is an abundant number, since it is smaller than the sum of its proper divisors (1374559648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321204052 is a wasteful number, since it uses less digits than its factorization.

1321204052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15480 (or 15471 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1321204052 is about 36348.3706925084. The cubic root of 1321204052 is about 1097.2947440900.

Adding to 1321204052 its reverse (2504021231), we get a palindrome (3825225283).

The spelling of 1321204052 in words is "one billion, three hundred twenty-one million, two hundred four thousand, fifty-two".