1265504941 has 2 divisors, whose sum is σ = 1265504942. Its totient is φ = 1265504940.

The previous prime is 1265504917. The next prime is 1265504957. The reversal of 1265504941 is 1494055621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666724041 + 598780900 = 25821^2 + 24470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265504941 - 2¹¹ = 1265502893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265504941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265504341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632752470 + 632752471.

It is an arithmetic number, because the mean of its divisors is an integer number (632752471).

Almost surely, 2^1265504941 is an apocalyptic number.

It is an amenable number.

1265504941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265504941 is an equidigital number, since it uses as much as digits as its factorization.

1265504941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1265504941 is about 35573.9362595707. The cubic root of 1265504941 is about 1081.6529731840.

The spelling of 1265504941 in words is "one billion, two hundred sixty-five million, five hundred four thousand, nine hundred forty-one".