13391122 has 4 divisors (see below), whose sum is σ = 20086686. Its totient is φ = 6695560.

The previous prime is 13391117. The next prime is 13391123. The reversal of 13391122 is 22119331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22119331 = 13 ⋅1701487.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 1343281 = 3471^2 + 1159^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13391093 and 13391102.

It is not an unprimeable number, because it can be changed into a prime (13391123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3347779 + ... + 3347782.

Almost surely, 2^13391122 is an apocalyptic number.

13391122 is a deficient number, since it is larger than the sum of its proper divisors (6695564).

13391122 is an equidigital number, since it uses as much as digits as its factorization.

13391122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695563.

The product of its digits is 324, while the sum is 22.

The square root of 13391122 is about 3659.3882002324. The cubic root of 13391122 is about 237.4683067589.

The spelling of 13391122 in words is "thirteen million, three hundred ninety-one thousand, one hundred twenty-two".