1275426049 has 2 divisors, whose sum is σ = 1275426050. Its totient is φ = 1275426048.

The previous prime is 1275426043. The next prime is 1275426101. The reversal of 1275426049 is 9406245721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1167930625 + 107495424 = 34175^2 + 10368^2 .

It is an emirp because it is prime and its reverse (9406245721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1275426049 - 2³ = 1275426041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1275426041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637713024 + 637713025.

It is an arithmetic number, because the mean of its divisors is an integer number (637713025).

Almost surely, 2^1275426049 is an apocalyptic number.

It is an amenable number.

1275426049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275426049 is an equidigital number, since it uses as much as digits as its factorization.

1275426049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1275426049 is about 35713.1075237090. The cubic root of 1275426049 is about 1084.4722100496.

The spelling of 1275426049 in words is "one billion, two hundred seventy-five million, four hundred twenty-six thousand, forty-nine".