13121158 has 4 divisors (see below), whose sum is σ = 19681740. Its totient is φ = 6560578.

The previous prime is 13121117. The next prime is 13121159. The reversal of 13121158 is 85112131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85112131 = 13 ⋅6547087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280288 + ... + 3280291.

It is an arithmetic number, because the mean of its divisors is an integer number (4920435).

Almost surely, 2^13121158 is an apocalyptic number.

13121158 is a deficient number, since it is larger than the sum of its proper divisors (6560582).

13121158 is an equidigital number, since it uses as much as digits as its factorization.

13121158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560581.

The product of its digits is 240, while the sum is 22.

The square root of 13121158 is about 3622.3139013619. The cubic root of 13121158 is about 235.8616804137.

Adding to 13121158 its reverse (85112131), we get a palindrome (98233289).

The spelling of 13121158 in words is "thirteen million, one hundred twenty-one thousand, one hundred fifty-eight".