1284489149 has 2 divisors, whose sum is σ = 1284489150. Its totient is φ = 1284489148.

The previous prime is 1284489137. The next prime is 1284489169. The reversal of 1284489149 is 9419844821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873616249 + 410872900 = 29557^2 + 20270^2 .

It is an emirp because it is prime and its reverse (9419844821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1284489149 - 2²⁴ = 1267711933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1284489097 and 1284489106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284489169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642244574 + 642244575.

It is an arithmetic number, because the mean of its divisors is an integer number (642244575).

Almost surely, 2^1284489149 is an apocalyptic number.

It is an amenable number.

1284489149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284489149 is an equidigital number, since it uses as much as digits as its factorization.

1284489149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 50.

The square root of 1284489149 is about 35839.7704931268. The cubic root of 1284489149 is about 1087.0348807482.

The spelling of 1284489149 in words is "one billion, two hundred eighty-four million, four hundred eighty-nine thousand, one hundred forty-nine".