1153265 has 4 divisors (see below), whose sum is σ = 1383924. Its totient is φ = 922608.

The previous prime is 1153261. The next prime is 1153267. The reversal of 1153265 is 5623511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5623511 = 67 ⋅83933.

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 692224 = 679^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153265 - 2² = 1153261 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1153265.

It is not an unprimeable number, because it can be changed into a prime (1153261) 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, 115322 + ... + 115331.

It is an arithmetic number, because the mean of its divisors is an integer number (345981).

2^1153265 is an apocalyptic number.

It is an amenable number.

1153265 is a deficient number, since it is larger than the sum of its proper divisors (230659).

1153265 is an equidigital number, since it uses as much as digits as its factorization.

1153265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230658.

The product of its digits is 900, while the sum is 23.

The square root of 1153265 is about 1073.9017645949. The cubic root of 1153265 is about 104.8680125407.

Adding to 1153265 its reverse (5623511), we get a palindrome (6776776).

The spelling of 1153265 in words is "one million, one hundred fifty-three thousand, two hundred sixty-five".