1153121 has 4 divisors (see below), whose sum is σ = 1174932. Its totient is φ = 1131312.

The previous prime is 1153109. The next prime is 1153123. The reversal of 1153121 is 1213511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 960400 + 192721 = 980^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153121 - 2⁶ = 1153057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1153096 and 1153105.

It is not an unprimeable number, because it can be changed into a prime (1153123) 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, 10826 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (293733).

2^1153121 is an apocalyptic number.

It is an amenable number.

1153121 is a deficient number, since it is larger than the sum of its proper divisors (21811).

1153121 is an equidigital number, since it uses as much as digits as its factorization.

1153121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21810.

The product of its digits is 30, while the sum is 14.

The square root of 1153121 is about 1073.8347172633. The cubic root of 1153121 is about 104.8636476513.

Adding to 1153121 its reverse (1213511), we get a palindrome (2366632).

The spelling of 1153121 in words is "one million, one hundred fifty-three thousand, one hundred twenty-one".