12786031 has 4 divisors (see below), whose sum is σ = 13459000. Its totient is φ = 12113064.

The previous prime is 12786029. The next prime is 12786049. The reversal of 12786031 is 13068721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12786031 - 2¹ = 12786029 is a prime.

It is a super-2 number, since 2×12786031² = 326965177465922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12786001) 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 3 ways as a sum of consecutive naturals, for example, 336456 + ... + 336493.

It is an arithmetic number, because the mean of its divisors is an integer number (3364750).

Almost surely, 2^12786031 is an apocalyptic number.

12786031 is a deficient number, since it is larger than the sum of its proper divisors (672969).

12786031 is an equidigital number, since it uses as much as digits as its factorization.

12786031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672968.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 12786031 is about 3575.7560039801. The cubic root of 12786031 is about 233.8362930748.

The spelling of 12786031 in words is "twelve million, seven hundred eighty-six thousand, thirty-one".