1158545 has 4 divisors (see below), whose sum is σ = 1390260. Its totient is φ = 926832.

The previous prime is 1158541. The next prime is 1158551. The reversal of 1158545 is 5458511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5458511 = 31 ⋅176081.

It can be written as a sum of positive squares in 2 ways, for example, as 760384 + 398161 = 872^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158545 - 2² = 1158541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1158541) 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, 115850 + ... + 115859.

It is an arithmetic number, because the mean of its divisors is an integer number (347565).

2^1158545 is an apocalyptic number.

It is an amenable number.

1158545 is a deficient number, since it is larger than the sum of its proper divisors (231715).

1158545 is an equidigital number, since it uses as much as digits as its factorization.

1158545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231714.

The product of its digits is 4000, while the sum is 29.

The square root of 1158545 is about 1076.3572826901. The cubic root of 1158545 is about 105.0278082053.

The spelling of 1158545 in words is "one million, one hundred fifty-eight thousand, five hundred forty-five".