13120145 has 4 divisors (see below), whose sum is σ = 15744180. Its totient is φ = 10496112.

The previous prime is 13120139. The next prime is 13120153. The reversal of 13120145 is 54102131.

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 1803649 + 11316496 = 1343^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 13120145 - 2²² = 8925841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312010 + ... + 1312019.

It is an arithmetic number, because the mean of its divisors is an integer number (3936045).

Almost surely, 2^13120145 is an apocalyptic number.

It is an amenable number.

13120145 is a deficient number, since it is larger than the sum of its proper divisors (2624035).

13120145 is an equidigital number, since it uses as much as digits as its factorization.

13120145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624034.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 13120145 is about 3622.1740709138. The cubic root of 13120145 is about 235.8556104711.

Adding to 13120145 its reverse (54102131), we get a palindrome (67222276).

The spelling of 13120145 in words is "thirteen million, one hundred twenty thousand, one hundred forty-five".