13881145 has 8 divisors (see below), whose sum is σ = 16677504. Its totient is φ = 11091504.

The previous prime is 13881143. The next prime is 13881151. The reversal of 13881145 is 54118831.

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

It is a cyclic number.

It is not a de Polignac number, because 13881145 - 2¹ = 13881143 is a prime.

It is a super-2 number, since 2×13881145² = 385372373022050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13881143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6502 + ... + 8368.

It is an arithmetic number, because the mean of its divisors is an integer number (2084688).

Almost surely, 2^13881145 is an apocalyptic number.

It is an amenable number.

13881145 is a deficient number, since it is larger than the sum of its proper divisors (2796359).

13881145 is a wasteful number, since it uses less digits than its factorization.

13881145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its digits is 3840, while the sum is 31.

The square root of 13881145 is about 3725.7408659218. The cubic root of 13881145 is about 240.3302455974.

Adding to 13881145 its reverse (54118831), we get a palindrome (67999976).

The spelling of 13881145 in words is "thirteen million, eight hundred eighty-one thousand, one hundred forty-five".