1265461263 has 48 divisors (see below), whose sum is σ = 2030745600. Its totient is φ = 752955840.

The previous prime is 1265461259. The next prime is 1265461271. The reversal of 1265461263 is 3621645621.

1265461263 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1265461263 - 2² = 1265461259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265461163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1868881 + ... + 1869557.

It is an arithmetic number, because the mean of its divisors is an integer number (42307200).

Almost surely, 2^1265461263 is an apocalyptic number.

1265461263 is a deficient number, since it is larger than the sum of its proper divisors (765284337).

1265461263 is a wasteful number, since it uses less digits than its factorization.

1265461263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 1009 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1265461263 is about 35573.3223497609. The cubic root of 1265461263 is about 1081.6405288807.

The spelling of 1265461263 in words is "one billion, two hundred sixty-five million, four hundred sixty-one thousand, two hundred sixty-three".