12130312 has 8 divisors (see below), whose sum is σ = 22744350. Its totient is φ = 6065152.

The previous prime is 12130309. The next prime is 12130319. The reversal of 12130312 is 21303121.

It can be written as a sum of positive squares in only one way, i.e., 7695076 + 4435236 = 2774^2 + 2106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12130292 and 12130301.

It is not an unprimeable number, because it can be changed into a prime (12130319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758137 + ... + 758152.

Almost surely, 2^12130312 is an apocalyptic number.

It is an amenable number.

12130312 is a deficient number, since it is larger than the sum of its proper divisors (10614038).

12130312 is a wasteful number, since it uses less digits than its factorization.

12130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516295 (or 1516291 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12130312 is about 3482.8597445203. The cubic root of 12130312 is about 229.7685889234.

Adding to 12130312 its reverse (21303121), we get a palindrome (33433433).

The spelling of 12130312 in words is "twelve million, one hundred thirty thousand, three hundred twelve".