1156765 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 840960.

The previous prime is 1156751. The next prime is 1156769. The reversal of 1156765 is 5676511.

It is not a de Polignac number, because 1156765 - 2⁷ = 1156637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156769) 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 15 ways as a sum of consecutive naturals, for example, 2416 + ... + 2854.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1156765 is an apocalyptic number.

It is an amenable number.

1156765 is a deficient number, since it is larger than the sum of its proper divisors (363875).

1156765 is a wasteful number, since it uses less digits than its factorization.

1156765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 6300, while the sum is 31.

The square root of 1156765 is about 1075.5301018568. The cubic root of 1156765 is about 104.9739920468.

The spelling of 1156765 in words is "one million, one hundred fifty-six thousand, seven hundred sixty-five".