1279403045449 has 9 divisors (see below), whose sum is σ = 1283883115431. Its totient is φ = 1274938566120.

The previous prime is 1279403045447. The next prime is 1279403045507. The reversal of 1279403045449 is 9445403049721.

The square root of 1279403045449 is 1131107.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34241652025 + 1245161393424 = 185045^2 + 1115868^2 .

It is not a de Polignac number, because 1279403045449 - 2¹ = 1279403045447 is a prime.

It is a super-2 number, since 2×1279403045449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1279403045396 and 1279403045405.

It is not an unprimeable number, because it can be changed into a prime (1279403045443) 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 in 8 ways as a sum of consecutive naturals, for example, 351772459 + ... + 351776095.

Almost surely, 2^{1279403045449} is an apocalyptic number.

1279403045449 is the 1131107-th square number.

1279403045449 is the 565554-th centered octagonal number.

It is an amenable number.

1279403045449 is a deficient number, since it is larger than the sum of its proper divisors (4480069982).

1279403045449 is an frugal number, since it uses more digits than its factorization.

1279403045449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896 (or 3948 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 1279403045449 in words is "one trillion, two hundred seventy-nine billion, four hundred three million, forty-five thousand, four hundred forty-nine".