1265314261 has 2 divisors, whose sum is σ = 1265314262. Its totient is φ = 1265314260.

The previous prime is 1265314247. The next prime is 1265314273. The reversal of 1265314261 is 1624135621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1049371236 + 215943025 = 32394^2 + 14695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265314261 - 2¹³ = 1265306069 is a prime.

It is a super-2 number, since 2×1265314261² = 3202040358179952242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265314961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632657130 + 632657131.

It is an arithmetic number, because the mean of its divisors is an integer number (632657131).

Almost surely, 2^1265314261 is an apocalyptic number.

It is an amenable number.

1265314261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265314261 is an equidigital number, since it uses as much as digits as its factorization.

1265314261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 1265314261 is about 35571.2561065813. The cubic root of 1265314261 is about 1081.5986444225.

Adding to 1265314261 its reverse (1624135621), we get a palindrome (2889449882).

The spelling of 1265314261 in words is "one billion, two hundred sixty-five million, three hundred fourteen thousand, two hundred sixty-one".