13491145 has 4 divisors (see below), whose sum is σ = 16189380. Its totient is φ = 10792912.

The previous prime is 13491143. The next prime is 13491161. The reversal of 13491145 is 54119431.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 8020224 = 2339^2 + 2832^2 .

It is a cyclic number.

It is not a de Polignac number, because 13491145 - 2¹ = 13491143 is a prime.

It is a super-2 number, since 2×13491145² = 364021986822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13491143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349110 + ... + 1349119.

It is an arithmetic number, because the mean of its divisors is an integer number (4047345).

Almost surely, 2^13491145 is an apocalyptic number.

It is an amenable number.

13491145 is a deficient number, since it is larger than the sum of its proper divisors (2698235).

13491145 is an equidigital number, since it uses as much as digits as its factorization.

13491145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698234.

The product of its digits is 2160, while the sum is 28.

The square root of 13491145 is about 3673.0294036395. The cubic root of 13491145 is about 238.0580855331.

The spelling of 13491145 in words is "thirteen million, four hundred ninety-one thousand, one hundred forty-five".