13140981 has 32 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 7180272.

The previous prime is 13140977. The next prime is 13140997. The reversal of 13140981 is 18904131.

13140981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13140981 - 2² = 13140977 is a prime.

It is a super-2 number, since 2×13140981² = 345370763284722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2836 + ... + 5858.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^13140981 is an apocalyptic number.

It is an amenable number.

13140981 is a deficient number, since it is larger than the sum of its proper divisors (10083339).

13140981 is a wasteful number, since it uses less digits than its factorization.

13140981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 13140981 is about 3625.0491031157. The cubic root of 13140981 is about 235.9803979218.

The spelling of 13140981 in words is "thirteen million, one hundred forty thousand, nine hundred eighty-one".