13011945 has 8 divisors (see below), whose sum is σ = 20819136. Its totient is φ = 6939696.

The previous prime is 13011937. The next prime is 13011959. The reversal of 13011945 is 54911031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13011945 - 2³ = 13011937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433717 + ... + 433746.

It is an arithmetic number, because the mean of its divisors is an integer number (2602392).

Almost surely, 2^13011945 is an apocalyptic number.

13011945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13011945 is a deficient number, since it is larger than the sum of its proper divisors (7807191).

13011945 is an equidigital number, since it uses as much as digits as its factorization.

13011945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867471.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 13011945 is about 3607.2073685886. The cubic root of 13011945 is about 235.2054638869.

Adding to 13011945 its reverse (54911031), we get a palindrome (67922976).

The spelling of 13011945 in words is "thirteen million, eleven thousand, nine hundred forty-five".