1287472297 has 2 divisors, whose sum is σ = 1287472298. Its totient is φ = 1287472296.

The previous prime is 1287472267. The next prime is 1287472321. The reversal of 1287472297 is 7922747821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928786576 + 358685721 = 30476^2 + 18939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287472297 - 2¹⁹ = 1286948009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1287472297.

It is not a weakly prime, because it can be changed into another prime (1287472247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643736148 + 643736149.

It is an arithmetic number, because the mean of its divisors is an integer number (643736149).

Almost surely, 2^1287472297 is an apocalyptic number.

It is an amenable number.

1287472297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287472297 is an equidigital number, since it uses as much as digits as its factorization.

1287472297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The square root of 1287472297 is about 35881.3642020478. The cubic root of 1287472297 is about 1087.8757542778.

It can be divided in two parts, 128747 and 2297, that added together give a square (131044 = 362²).

The spelling of 1287472297 in words is "one billion, two hundred eighty-seven million, four hundred seventy-two thousand, two hundred ninety-seven".