1265493287 has 2 divisors, whose sum is σ = 1265493288. Its totient is φ = 1265493286.

The previous prime is 1265493263. The next prime is 1265493323. The reversal of 1265493287 is 7823945621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265493287 - 2⁶ = 1265493223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265493227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632746643 + 632746644.

It is an arithmetic number, because the mean of its divisors is an integer number (632746644).

Almost surely, 2^1265493287 is an apocalyptic number.

1265493287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265493287 is an equidigital number, since it uses as much as digits as its factorization.

1265493287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 1265493287 is about 35573.7724594961. The cubic root of 1265493287 is about 1081.6496528698.

The spelling of 1265493287 in words is "one billion, two hundred sixty-five million, four hundred ninety-three thousand, two hundred eighty-seven".