1265275 has 24 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 890400.

The previous prime is 1265273. The next prime is 1265279. The reversal of 1265275 is 5725621.

It is not a de Polignac number, because 1265275 - 2¹ = 1265273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11772 + ... + 11878.

It is an arithmetic number, because the mean of its divisors is an integer number (73656).

2^1265275 is an apocalyptic number.

1265275 is a deficient number, since it is larger than the sum of its proper divisors (502469).

1265275 is a wasteful number, since it uses less digits than its factorization.

1265275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 166 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 1265275 is about 1124.8444336885. The cubic root of 1265275 is about 108.1587457456.

It can be divided in two parts, 1265 and 275, that added together give a triangular number (1540 = T₅₅).

The spelling of 1265275 in words is "one million, two hundred sixty-five thousand, two hundred seventy-five".