12031385 has 4 divisors (see below), whose sum is σ = 14437668. Its totient is φ = 9625104.

The previous prime is 12031373. The next prime is 12031387. The reversal of 12031385 is 58313021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58313021 = 13 ⋅4485617.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 2569609 = 3076^2 + 1603^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031385 - 2¹² = 12027289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031385.

It is not an unprimeable number, because it can be changed into a prime (12031387) 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, 1203134 + ... + 1203143.

It is an arithmetic number, because the mean of its divisors is an integer number (3609417).

Almost surely, 2^12031385 is an apocalyptic number.

It is an amenable number.

12031385 is a deficient number, since it is larger than the sum of its proper divisors (2406283).

12031385 is an equidigital number, since it uses as much as digits as its factorization.

12031385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406282.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12031385 is about 3468.6286915725. The cubic root of 12031385 is about 229.1422684034.

The spelling of 12031385 in words is "twelve million, thirty-one thousand, three hundred eighty-five".