1265787 has 12 divisors (see below), whose sum is σ = 1896440. Its totient is φ = 843696.

The previous prime is 1265779. The next prime is 1265801. The reversal of 1265787 is 7875621.

It is not a de Polignac number, because 1265787 - 2³ = 1265779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2362 + ... + 2847.

2^1265787 is an apocalyptic number.

1265787 is a deficient number, since it is larger than the sum of its proper divisors (630653).

1265787 is an frugal number, since it uses more digits than its factorization.

1265787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224 (or 5212 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1265787 is about 1125.0719976961. The cubic root of 1265787 is about 108.1733327748.

The spelling of 1265787 in words is "one million, two hundred sixty-five thousand, seven hundred eighty-seven".