12312149 has 2 divisors, whose sum is σ = 12312150. Its totient is φ = 12312148.

The previous prime is 12312143. The next prime is 12312173. The reversal of 12312149 is 94121321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 874225 = 3382^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312149 - 2¹² = 12308053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156074 + 6156075.

It is an arithmetic number, because the mean of its divisors is an integer number (6156075).

Almost surely, 2^12312149 is an apocalyptic number.

It is an amenable number.

12312149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312149 is an equidigital number, since it uses as much as digits as its factorization.

12312149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 12312149 is about 3508.8671961190. The cubic root of 12312149 is about 230.9109993652.

The spelling of 12312149 in words is "twelve million, three hundred twelve thousand, one hundred forty-nine".