1158857 has 4 divisors (see below), whose sum is σ = 1324416. Its totient is φ = 993300.

The previous prime is 1158847. The next prime is 1158863. The reversal of 1158857 is 7588511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1158857 - 2⁴ = 1158841 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1158827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82769 + ... + 82782.

It is an arithmetic number, because the mean of its divisors is an integer number (331104).

2^1158857 is an apocalyptic number.

It is an amenable number.

1158857 is a deficient number, since it is larger than the sum of its proper divisors (165559).

1158857 is an equidigital number, since it uses as much as digits as its factorization.

1158857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165558.

The product of its digits is 11200, while the sum is 35.

The square root of 1158857 is about 1076.5022062216. The cubic root of 1158857 is about 105.0372354711.

The spelling of 1158857 in words is "one million, one hundred fifty-eight thousand, eight hundred fifty-seven".