1153091 has 4 divisors (see below), whose sum is σ = 1213800. Its totient is φ = 1092384.

The previous prime is 1153073. The next prime is 1153099. The reversal of 1153091 is 1903511.

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

It is a cyclic number.

It is not a de Polignac number, because 1153091 - 2⁶ = 1153027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153099) 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, 30326 + ... + 30363.

It is an arithmetic number, because the mean of its divisors is an integer number (303450).

2^1153091 is an apocalyptic number.

1153091 is a deficient number, since it is larger than the sum of its proper divisors (60709).

1153091 is an equidigital number, since it uses as much as digits as its factorization.

1153091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60708.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1153091 is about 1073.8207485423. The cubic root of 1153091 is about 104.8627382536.

The spelling of 1153091 in words is "one million, one hundred fifty-three thousand, ninety-one".