12131005 has 16 divisors (see below), whose sum is σ = 15606144. Its totient is φ = 9028800.

The previous prime is 12130999. The next prime is 12131017. The reversal of 12131005 is 50013121.

It is not a de Polignac number, because 12131005 - 2⁵ = 12130973 is a prime.

It is a super-2 number, since 2×12131005² = 294322564620050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2830 + ... + 5680.

It is an arithmetic number, because the mean of its divisors is an integer number (975384).

Almost surely, 2^12131005 is an apocalyptic number.

It is an amenable number.

12131005 is a deficient number, since it is larger than the sum of its proper divisors (3475139).

12131005 is a wasteful number, since it uses less digits than its factorization.

12131005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 12131005 is about 3482.9592303098. The cubic root of 12131005 is about 229.7729643701.

Adding to 12131005 its reverse (50013121), we get a palindrome (62144126).

The spelling of 12131005 in words is "twelve million, one hundred thirty-one thousand, five".