13945181 has 8 divisors (see below), whose sum is σ = 14385600. Its totient is φ = 13511680.

The previous prime is 13945163. The next prime is 13945193. The reversal of 13945181 is 18154931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13945181 is a prime.

It is a super-2 number, since 2×13945181² = 388936146245522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13945111) by changing a digit.

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, 2525 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^13945181 is an apocalyptic number.

It is an amenable number.

13945181 is a deficient number, since it is larger than the sum of its proper divisors (440419).

13945181 is an equidigital number, since it uses as much as digits as its factorization.

13945181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459.

The product of its digits is 4320, while the sum is 32.

The square root of 13945181 is about 3734.3247046822. The cubic root of 13945181 is about 240.6992397226.

The spelling of 13945181 in words is "thirteen million, nine hundred forty-five thousand, one hundred eighty-one".