12151285 has 4 divisors (see below), whose sum is σ = 14581548. Its totient is φ = 9721024.

The previous prime is 12151273. The next prime is 12151289. The reversal of 12151285 is 58215121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 4566769 = 2754^2 + 2137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12151285 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151289) 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, 1215124 + ... + 1215133.

It is an arithmetic number, because the mean of its divisors is an integer number (3645387).

Almost surely, 2^12151285 is an apocalyptic number.

It is an amenable number.

12151285 is a deficient number, since it is larger than the sum of its proper divisors (2430263).

12151285 is an equidigital number, since it uses as much as digits as its factorization.

12151285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430262.

The product of its digits is 800, while the sum is 25.

The square root of 12151285 is about 3485.8693320318. The cubic root of 12151285 is about 229.9009340218.

It can be divided in two parts, 1215 and 1285, that added together give a square (2500 = 50²).

The spelling of 12151285 in words is "twelve million, one hundred fifty-one thousand, two hundred eighty-five".