13056145 has 4 divisors (see below), whose sum is σ = 15667380. Its totient is φ = 10444912.

The previous prime is 13056107. The next prime is 13056151. The reversal of 13056145 is 54165031.

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 7706176 + 5349969 = 2776^2 + 2313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13056145 is a prime.

It is a super-2 number, since 2×13056145² = 340925844522050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305610 + ... + 1305619.

It is an arithmetic number, because the mean of its divisors is an integer number (3916845).

Almost surely, 2^13056145 is an apocalyptic number.

It is an amenable number.

13056145 is a deficient number, since it is larger than the sum of its proper divisors (2611235).

13056145 is an equidigital number, since it uses as much as digits as its factorization.

13056145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611234.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13056145 is about 3613.3287976601. The cubic root of 13056145 is about 235.4714843847.

The spelling of 13056145 in words is "thirteen million, fifty-six thousand, one hundred forty-five".