1321006753 has 16 divisors (see below), whose sum is σ = 1494345600. Its totient is φ = 1156740480.

The previous prime is 1321006723. The next prime is 1321006763. The reversal of 1321006753 is 3576001231.

It is a cyclic number.

It is not a de Polignac number, because 1321006753 - 2²⁵ = 1287452321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321006723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135325 + ... + 144757.

It is an arithmetic number, because the mean of its divisors is an integer number (93396600).

Almost surely, 2^1321006753 is an apocalyptic number.

It is an amenable number.

1321006753 is a deficient number, since it is larger than the sum of its proper divisors (173338847).

1321006753 is a wasteful number, since it uses less digits than its factorization.

1321006753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1321006753 is about 36345.6565905749. The cubic root of 1321006753 is about 1097.2401206998.

Adding to 1321006753 its reverse (3576001231), we get a palindrome (4897007984).

The spelling of 1321006753 in words is "one billion, three hundred twenty-one million, six thousand, seven hundred fifty-three".