12240031 has 4 divisors (see below), whose sum is σ = 12254032. Its totient is φ = 12226032.

The previous prime is 12240013. The next prime is 12240037. The reversal of 12240031 is 13004221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13004221 = 31 ⋅419491.

It is a cyclic number.

It is not a de Polignac number, because 12240031 - 2⁵ = 12239999 is a prime.

It is a super-2 number, since 2×12240031² = 299636717761922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12239993 and 12240020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5595 + ... + 7468.

It is an arithmetic number, because the mean of its divisors is an integer number (3063508).

Almost surely, 2^12240031 is an apocalyptic number.

12240031 is a deficient number, since it is larger than the sum of its proper divisors (14001).

12240031 is an equidigital number, since it uses as much as digits as its factorization.

12240031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14000.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12240031 is about 3498.5755672845. The cubic root of 12240031 is about 230.4592650617.

Adding to 12240031 its reverse (13004221), we get a palindrome (25244252).

The spelling of 12240031 in words is "twelve million, two hundred forty thousand, thirty-one".