12213943 has 16 divisors (see below), whose sum is σ = 14722560. Its totient is φ = 9906336.

The previous prime is 12213931. The next prime is 12213947. The reversal of 12213943 is 34931221.

It is a cyclic number.

It is not a de Polignac number, because 12213943 - 2¹³ = 12205751 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 (12213947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16873 + ... + 17581.

It is an arithmetic number, because the mean of its divisors is an integer number (920160).

Almost surely, 2^12213943 is an apocalyptic number.

12213943 is a deficient number, since it is larger than the sum of its proper divisors (2508617).

12213943 is a wasteful number, since it uses less digits than its factorization.

12213943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 1296, while the sum is 25.

The square root of 12213943 is about 3494.8452040112. The cubic root of 12213943 is about 230.2954174977.

The spelling of 12213943 in words is "twelve million, two hundred thirteen thousand, nine hundred forty-three".