1321100449 has 2 divisors, whose sum is σ = 1321100450. Its totient is φ = 1321100448.

The previous prime is 1321100441. The next prime is 1321100471. The reversal of 1321100449 is 9440011231.

It is a happy number.

1321100449 is nontrivially palindromic in base 7.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215010449 + 106090000 = 34857^2 + 10300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321100449 - 2³ = 1321100441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321100441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660550224 + 660550225.

It is an arithmetic number, because the mean of its divisors is an integer number (660550225).

Almost surely, 2^1321100449 is an apocalyptic number.

It is an amenable number.

1321100449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321100449 is an equidigital number, since it uses as much as digits as its factorization.

1321100449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1321100449 is about 36346.9455250369. The cubic root of 1321100449 is about 1097.2660616674.

The spelling of 1321100449 in words is "one billion, three hundred twenty-one million, one hundred thousand, four hundred forty-nine".