1275250049 has 2 divisors, whose sum is σ = 1275250050. Its totient is φ = 1275250048.

The previous prime is 1275250021. The next prime is 1275250051. The reversal of 1275250049 is 9400525721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168272400 + 106977649 = 34180^2 + 10343^2 .

It is an emirp because it is prime and its reverse (9400525721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1275250049 - 2¹² = 1275245953 is a prime.

Together with 1275250051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1275255049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637625024 + 637625025.

It is an arithmetic number, because the mean of its divisors is an integer number (637625025).

Almost surely, 2^1275250049 is an apocalyptic number.

It is an amenable number.

1275250049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275250049 is an equidigital number, since it uses as much as digits as its factorization.

1275250049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1275250049 is about 35710.6433574082. The cubic root of 1275250049 is about 1084.4223245259.

The spelling of 1275250049 in words is "one billion, two hundred seventy-five million, two hundred fifty thousand, forty-nine".