1226987287 has 2 divisors, whose sum is σ = 1226987288. Its totient is φ = 1226987286.

The previous prime is 1226987269. The next prime is 1226987329. The reversal of 1226987287 is 7827896221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7827896221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226987287 - 2⁷ = 1226987159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226907287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613493643 + 613493644.

It is an arithmetic number, because the mean of its divisors is an integer number (613493644).

Almost surely, 2^1226987287 is an apocalyptic number.

1226987287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226987287 is an equidigital number, since it uses as much as digits as its factorization.

1226987287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 1226987287 is about 35028.3783095935. The cubic root of 1226987287 is about 1070.5657726445.

The spelling of 1226987287 in words is "one billion, two hundred twenty-six million, nine hundred eighty-seven thousand, two hundred eighty-seven".