1156365 has 24 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 528480.

The previous prime is 1156343. The next prime is 1156367. The reversal of 1156365 is 5636511.

It is a happy number.

It is not a de Polignac number, because 1156365 - 2⁵ = 1156333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1521 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (95472).

2^1156365 is an apocalyptic number.

1156365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156365 is a deficient number, since it is larger than the sum of its proper divisors (1134963).

1156365 is a wasteful number, since it uses less digits than its factorization.

1156365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689 (or 3686 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1156365 is about 1075.3441309646. The cubic root of 1156365 is about 104.9618909321.

It can be divided in two parts, 11563 and 65, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1156365 in words is "one million, one hundred fifty-six thousand, three hundred sixty-five".