1097158 has 4 divisors (see below), whose sum is σ = 1645740. Its totient is φ = 548578.

The previous prime is 1097147. The next prime is 1097179. The reversal of 1097158 is 8517901.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 274288 + ... + 274291.

It is an arithmetic number, because the mean of its divisors is an integer number (411435).

2^1097158 is an apocalyptic number.

1097158 is a deficient number, since it is larger than the sum of its proper divisors (548582).

1097158 is an equidigital number, since it uses as much as digits as its factorization.

1097158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548581.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1097158 is about 1047.4531015754. The cubic root of 1097158 is about 103.1390336580.

The spelling of 1097158 in words is "one million, ninety-seven thousand, one hundred fifty-eight".