12611031 has 4 divisors (see below), whose sum is σ = 16814712. Its totient is φ = 8407352.

The previous prime is 12611029. The next prime is 12611047. The reversal of 12611031 is 13011621.

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 12611031 - 2¹ = 12611029 is a prime.

It is a super-3 number, since 3×12611031³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 12611031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611051) 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, 2101836 + ... + 2101841.

It is an arithmetic number, because the mean of its divisors is an integer number (4203678).

Almost surely, 2^12611031 is an apocalyptic number.

12611031 is a deficient number, since it is larger than the sum of its proper divisors (4203681).

12611031 is an equidigital number, since it uses as much as digits as its factorization.

12611031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203680.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 12611031 is about 3551.2013460236. The cubic root of 12611031 is about 232.7645641379.

Adding to 12611031 its reverse (13011621), we get a palindrome (25622652).

The spelling of 12611031 in words is "twelve million, six hundred eleven thousand, thirty-one".