1228987 has 2 divisors, whose sum is σ = 1228988. Its totient is φ = 1228986.

The previous prime is 1228963. The next prime is 1228993. The reversal of 1228987 is 7898221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7898221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228987 - 2¹⁵ = 1196219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614493 + 614494.

It is an arithmetic number, because the mean of its divisors is an integer number (614494).

2^1228987 is an apocalyptic number.

1228987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228987 is an equidigital number, since it uses as much as digits as its factorization.

1228987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 1228987 is about 1108.5968609012. The cubic root of 1228987 is about 107.1147050692.

The spelling of 1228987 in words is "one million, two hundred twenty-eight thousand, nine hundred eighty-seven".