1274255261 has 2 divisors, whose sum is σ = 1274255262. Its totient is φ = 1274255260.

The previous prime is 1274255243. The next prime is 1274255293. The reversal of 1274255261 is 1625524721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1260676036 + 13579225 = 35506^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1274255261 - 2¹⁰ = 1274254237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1274225261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637127630 + 637127631.

It is an arithmetic number, because the mean of its divisors is an integer number (637127631).

Almost surely, 2^1274255261 is an apocalyptic number.

It is an amenable number.

1274255261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1274255261 is an equidigital number, since it uses as much as digits as its factorization.

1274255261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 1274255261 is about 35696.7121875391. The cubic root of 1274255261 is about 1084.1402750188.

Adding to 1274255261 its reverse (1625524721), we get a palindrome (2899779982).

The spelling of 1274255261 in words is "one billion, two hundred seventy-four million, two hundred fifty-five thousand, two hundred sixty-one".