1265321 has 2 divisors, whose sum is σ = 1265322. Its totient is φ = 1265320.

The previous prime is 1265311. The next prime is 1265333. The reversal of 1265321 is 1235621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1132096 + 133225 = 1064^2 + 365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1265293 and 1265302.

It is not a weakly prime, because it can be changed into another prime (1265311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632660 + 632661.

It is an arithmetic number, because the mean of its divisors is an integer number (632661).

2^1265321 is an apocalyptic number.

It is an amenable number.

1265321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265321 is an equidigital number, since it uses as much as digits as its factorization.

1265321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 1265321 is about 1124.8648807746. The cubic root of 1265321 is about 108.1600564599.

The spelling of 1265321 in words is "one million, two hundred sixty-five thousand, three hundred twenty-one".