1321040269 has 2 divisors, whose sum is σ = 1321040270. Its totient is φ = 1321040268.

The previous prime is 1321040263. The next prime is 1321040353. The reversal of 1321040269 is 9620401231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182672100 + 138368169 = 34390^2 + 11763^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321040269 - 2¹⁹ = 1320515981 is a prime.

It is a super-2 number, since 2×1321040269² = 3490294784639184722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321040263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660520134 + 660520135.

It is an arithmetic number, because the mean of its divisors is an integer number (660520135).

Almost surely, 2^1321040269 is an apocalyptic number.

It is an amenable number.

1321040269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321040269 is an equidigital number, since it uses as much as digits as its factorization.

1321040269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1321040269 is about 36346.1176606250. The cubic root of 1321040269 is about 1097.2494001853.

It can be divided in two parts, 132 and 1040269, that added together give a palindrome (1040401).

The spelling of 1321040269 in words is "one billion, three hundred twenty-one million, forty thousand, two hundred sixty-nine".