1298158 has 4 divisors (see below), whose sum is σ = 1947240. Its totient is φ = 649078.

The previous prime is 1298149. The next prime is 1298161. The reversal of 1298158 is 8518921.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324538 + ... + 324541.

It is an arithmetic number, because the mean of its divisors is an integer number (486810).

2^1298158 is an apocalyptic number.

1298158 is a deficient number, since it is larger than the sum of its proper divisors (649082).

1298158 is an equidigital number, since it uses as much as digits as its factorization.

1298158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649081.

The product of its digits is 5760, while the sum is 34.

The square root of 1298158 is about 1139.3673683233. The cubic root of 1298158 is about 109.0877166153.

The spelling of 1298158 in words is "one million, two hundred ninety-eight thousand, one hundred fifty-eight".