12147813 has 12 divisors (see below), whose sum is σ = 18197088. Its totient is φ = 8098380.

The previous prime is 12147787. The next prime is 12147823. The reversal of 12147813 is 31874121.

It is not a de Polignac number, because 12147813 - 2¹⁴ = 12131429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24753 + ... + 25238.

It is an arithmetic number, because the mean of its divisors is an integer number (1516424).

Almost surely, 2^12147813 is an apocalyptic number.

It is an amenable number.

12147813 is a deficient number, since it is larger than the sum of its proper divisors (6049275).

12147813 is an frugal number, since it uses more digits than its factorization.

12147813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50006 (or 49994 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 12147813 is about 3485.3712858173. The cubic root of 12147813 is about 229.8790353206.

The spelling of 12147813 in words is "twelve million, one hundred forty-seven thousand, eight hundred thirteen".