1265765 has 4 divisors (see below), whose sum is σ = 1518924. Its totient is φ = 1012608.

The previous prime is 1265741. The next prime is 1265777. The reversal of 1265765 is 5675621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 277729 = 994^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265765 - 2¹⁰ = 1264741 is a prime.

It is a super-2 number, since 2×1265765² = 3204322070450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126572 + ... + 126581.

It is an arithmetic number, because the mean of its divisors is an integer number (379731).

2^1265765 is an apocalyptic number.

It is an amenable number.

1265765 is a deficient number, since it is larger than the sum of its proper divisors (253159).

1265765 is an equidigital number, since it uses as much as digits as its factorization.

1265765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253158.

The product of its digits is 12600, while the sum is 32.

The square root of 1265765 is about 1125.0622205016. The cubic root of 1265765 is about 108.1727060693.

The spelling of 1265765 in words is "one million, two hundred sixty-five thousand, seven hundred sixty-five".