1268158 has 4 divisors (see below), whose sum is σ = 1902240. Its totient is φ = 634078.

The previous prime is 1268147. The next prime is 1268167. The reversal of 1268158 is 8518621.

1268158 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8518621 = 37 ⋅230233.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317038 + ... + 317041.

It is an arithmetic number, because the mean of its divisors is an integer number (475560).

2^1268158 is an apocalyptic number.

1268158 is a deficient number, since it is larger than the sum of its proper divisors (634082).

1268158 is an equidigital number, since it uses as much as digits as its factorization.

1268158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634081.

The product of its digits is 3840, while the sum is 31.

The square root of 1268158 is about 1126.1252150627. The cubic root of 1268158 is about 108.2408320191.

The spelling of 1268158 in words is "one million, two hundred sixty-eight thousand, one hundred fifty-eight".