12315771 has 12 divisors (see below), whose sum is σ = 19158048. Its totient is φ = 7578864.

The previous prime is 12315727. The next prime is 12315811. The reversal of 12315771 is 17751321.

It is a happy number.

It is not a de Polignac number, because 12315771 - 2⁶ = 12315707 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12315271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52515 + ... + 52748.

It is an arithmetic number, because the mean of its divisors is an integer number (1596504).

Almost surely, 2^12315771 is an apocalyptic number.

12315771 is a deficient number, since it is larger than the sum of its proper divisors (6842277).

12315771 is a wasteful number, since it uses less digits than its factorization.

12315771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105282 (or 105279 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 12315771 is about 3509.3832791532. The cubic root of 12315771 is about 230.9336403528.

The spelling of 12315771 in words is "twelve million, three hundred fifteen thousand, seven hundred seventy-one".