1153409 has 4 divisors (see below), whose sum is σ = 1161300. Its totient is φ = 1145520.

The previous prime is 1153393. The next prime is 1153421. The reversal of 1153409 is 9043511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9043511 = 269 ⋅33619.

It can be written as a sum of positive squares in 2 ways, for example, as 183184 + 970225 = 428^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153409 - 2⁴ = 1153393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153429) 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, 3722 + ... + 4019.

It is an arithmetic number, because the mean of its divisors is an integer number (290325).

2^1153409 is an apocalyptic number.

It is an amenable number.

1153409 is a deficient number, since it is larger than the sum of its proper divisors (7891).

1153409 is an equidigital number, since it uses as much as digits as its factorization.

1153409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7890.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1153409 is about 1073.9688077407. The cubic root of 1153409 is about 104.8723770667.

The spelling of 1153409 in words is "one million, one hundred fifty-three thousand, four hundred nine".