1151365 has 4 divisors (see below), whose sum is σ = 1381644. Its totient is φ = 921088.

The previous prime is 1151363. The next prime is 1151369. The reversal of 1151365 is 5631511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5631511 = 37 ⋅152203.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 743044 = 639^2 + 862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151365 - 2¹ = 1151363 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115132 + ... + 115141.

It is an arithmetic number, because the mean of its divisors is an integer number (345411).

2^1151365 is an apocalyptic number.

It is an amenable number.

1151365 is a deficient number, since it is larger than the sum of its proper divisors (230279).

1151365 is an equidigital number, since it uses as much as digits as its factorization.

1151365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230278.

The product of its digits is 450, while the sum is 22.

The square root of 1151365 is about 1073.0167752650. The cubic root of 1151365 is about 104.8103909923.

Adding to 1151365 its reverse (5631511), we get a palindrome (6782876).

The spelling of 1151365 in words is "one million, one hundred fifty-one thousand, three hundred sixty-five".