13140381 has 16 divisors (see below), whose sum is σ = 18532800. Its totient is φ = 8258688.

The previous prime is 13140367. The next prime is 13140389. The reversal of 13140381 is 18304131.

It is not a de Polignac number, because 13140381 - 2⁶ = 13140317 is a prime.

It is a super-2 number, since 2×13140381² = 345339225650322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14905 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (1158300).

Almost surely, 2^13140381 is an apocalyptic number.

It is an amenable number.

13140381 is a deficient number, since it is larger than the sum of its proper divisors (5392419).

13140381 is a wasteful number, since it uses less digits than its factorization.

13140381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13140381 is about 3624.9663446714. The cubic root of 13140381 is about 235.9768063484.

The spelling of 13140381 in words is "thirteen million, one hundred forty thousand, three hundred eighty-one".