1287624049 has 2 divisors, whose sum is σ = 1287624050. Its totient is φ = 1287624048.

The previous prime is 1287624001. The next prime is 1287624059. The reversal of 1287624049 is 9404267821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265936400 + 21687649 = 35580^2 + 4657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287624049 - 2¹⁵ = 1287591281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287623996 and 1287624014.

It is not a weakly prime, because it can be changed into another prime (1287624059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643812024 + 643812025.

It is an arithmetic number, because the mean of its divisors is an integer number (643812025).

Almost surely, 2^1287624049 is an apocalyptic number.

It is an amenable number.

1287624049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287624049 is an equidigital number, since it uses as much as digits as its factorization.

1287624049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1287624049 is about 35883.4787750575. The cubic root of 1287624049 is about 1087.9184945724.

The spelling of 1287624049 in words is "one billion, two hundred eighty-seven million, six hundred twenty-four thousand, forty-nine".