1316721052 has 12 divisors (see below), whose sum is σ = 2425538920. Its totient is φ = 623709936.

The previous prime is 1316721037. The next prime is 1316721053. The reversal of 1316721052 is 2501276131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1316721052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316721053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8662563 + ... + 8662714.

Almost surely, 2^1316721052 is an apocalyptic number.

It is an amenable number.

1316721052 is a deficient number, since it is larger than the sum of its proper divisors (1108817868).

1316721052 is a wasteful number, since it uses less digits than its factorization.

1316721052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17325300 (or 17325298 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1316721052 is about 36286.6511543846. The cubic root of 1316721052 is about 1096.0522545548.

Adding to 1316721052 its reverse (2501276131), we get a palindrome (3817997183).

The spelling of 1316721052 in words is "one billion, three hundred sixteen million, seven hundred twenty-one thousand, fifty-two".