1260845549 has 2 divisors, whose sum is σ = 1260845550. Its totient is φ = 1260845548.

The previous prime is 1260845543. The next prime is 1260845563. The reversal of 1260845549 is 9455480621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074659524 + 186186025 = 32782^2 + 13645^2 .

It is an emirp because it is prime and its reverse (9455480621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1260845549 - 2²⁰ = 1259796973 is a prime.

It is a super-2 number, since 2×1260845549² = 3179462996866222802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260845543) 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, 630422774 + 630422775.

It is an arithmetic number, because the mean of its divisors is an integer number (630422775).

Almost surely, 2^1260845549 is an apocalyptic number.

It is an amenable number.

1260845549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260845549 is an equidigital number, since it uses as much as digits as its factorization.

1260845549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 1260845549 is about 35508.3870233498. The cubic root of 1260845549 is about 1080.3238480689.

The spelling of 1260845549 in words is "one billion, two hundred sixty million, eight hundred forty-five thousand, five hundred forty-nine".