1287059549 has 2 divisors, whose sum is σ = 1287059550. Its totient is φ = 1287059548.

The previous prime is 1287059539. The next prime is 1287059551. The reversal of 1287059549 is 9459507821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815388025 + 471671524 = 28555^2 + 21718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287059549 - 2²⁴ = 1270282333 is a prime.

Together with 1287059551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287059497 and 1287059506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287059539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643529774 + 643529775.

It is an arithmetic number, because the mean of its divisors is an integer number (643529775).

Almost surely, 2^1287059549 is an apocalyptic number.

It is an amenable number.

1287059549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287059549 is an equidigital number, since it uses as much as digits as its factorization.

1287059549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 50.

The square root of 1287059549 is about 35875.6121759615. The cubic root of 1287059549 is about 1087.7594885959.

The spelling of 1287059549 in words is "one billion, two hundred eighty-seven million, fifty-nine thousand, five hundred forty-nine".