1282819249 has 2 divisors, whose sum is σ = 1282819250. Its totient is φ = 1282819248.

The previous prime is 1282819247. The next prime is 1282819283. The reversal of 1282819249 is 9429182821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1138050225 + 144769024 = 33735^2 + 12032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1282819249 - 2¹ = 1282819247 is a prime.

It is a super-3 number, since 3×1282819249³ (a number of 28 digits) contains 333 as substring.

Together with 1282819247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1282819199 and 1282819208.

It is not a weakly prime, because it can be changed into another prime (1282819243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641409624 + 641409625.

It is an arithmetic number, because the mean of its divisors is an integer number (641409625).

Almost surely, 2^1282819249 is an apocalyptic number.

It is an amenable number.

1282819249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282819249 is an equidigital number, since it uses as much as digits as its factorization.

1282819249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 46.

The square root of 1282819249 is about 35816.4661713017. The cubic root of 1282819249 is about 1086.5636099318.

The spelling of 1282819249 in words is "one billion, two hundred eighty-two million, eight hundred nineteen thousand, two hundred forty-nine".