12731311 has 8 divisors (see below), whose sum is σ = 13713920. Its totient is φ = 11779992.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731311 is 11313721.

12731311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12731311 - 2¹³ = 12723119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731611) 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, 6975 + ... + 8608.

It is an arithmetic number, because the mean of its divisors is an integer number (1714240).

Almost surely, 2^12731311 is an apocalyptic number.

12731311 is a deficient number, since it is larger than the sum of its proper divisors (982609).

12731311 is a wasteful number, since it uses less digits than its factorization.

12731311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15645.

The product of its digits is 126, while the sum is 19.

The square root of 12731311 is about 3568.0962711227. The cubic root of 12731311 is about 233.5022353045.

The spelling of 12731311 in words is "twelve million, seven hundred thirty-one thousand, three hundred eleven".