1282765949 has 2 divisors, whose sum is σ = 1282765950. Its totient is φ = 1282765948.

The previous prime is 1282765919. The next prime is 1282765951. The reversal of 1282765949 is 9495672821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1266078724 + 16687225 = 35582^2 + 4085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1282765949 is a prime.

Together with 1282765951, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1282765949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1282765909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641382974 + 641382975.

It is an arithmetic number, because the mean of its divisors is an integer number (641382975).

Almost surely, 2^1282765949 is an apocalyptic number.

It is an amenable number.

1282765949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282765949 is an equidigital number, since it uses as much as digits as its factorization.

1282765949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 1282765949 is about 35815.7220923996. The cubic root of 1282765949 is about 1086.5485611391.

The spelling of 1282765949 in words is "one billion, two hundred eighty-two million, seven hundred sixty-five thousand, nine hundred forty-nine".