1321763 has 2 divisors, whose sum is σ = 1321764. Its totient is φ = 1321762.

The previous prime is 1321759. The next prime is 1321769. The reversal of 1321763 is 3671231.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3671231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321763 - 2² = 1321759 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660881 + 660882.

It is an arithmetic number, because the mean of its divisors is an integer number (660882).

2^1321763 is an apocalyptic number.

1321763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321763 is an equidigital number, since it uses as much as digits as its factorization.

1321763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 1321763 is about 1149.6795205621. The cubic root of 1321763 is about 109.7449462616.

Adding to 1321763 its reverse (3671231), we get a palindrome (4992994).

The spelling of 1321763 in words is "one million, three hundred twenty-one thousand, seven hundred sixty-three".