1143265 has 8 divisors (see below), whose sum is σ = 1382760. Its totient is φ = 907392.

The previous prime is 1143257. The next prime is 1143269. The reversal of 1143265 is 5623411.

It can be written as a sum of positive squares in 4 ways, for example, as 159201 + 984064 = 399^2 + 992^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143265 - 2³ = 1143257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150 + ... + 1519.

It is an arithmetic number, because the mean of its divisors is an integer number (172845).

2^1143265 is an apocalyptic number.

It is an amenable number.

1143265 is a deficient number, since it is larger than the sum of its proper divisors (239495).

1143265 is a wasteful number, since it uses less digits than its factorization.

1143265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its digits is 720, while the sum is 22.

The square root of 1143265 is about 1069.2357083450. The cubic root of 1143265 is about 104.5640275188.

Adding to 1143265 its reverse (5623411), we get a palindrome (6766676).

The spelling of 1143265 in words is "one million, one hundred forty-three thousand, two hundred sixty-five".