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12424 = 231553

12424 has 8 divisors (see below), whose sum is σ = 23310. Its totient is φ = 6208.

The previous prime is 12421. The next prime is 12433. The reversal of 12424 is 42421.

Adding to 12424 its reverse (42421), we get a palindrome (54845).

It can be written as a sum of positive squares in only one way, i.e., 12100 + 324 = 110^2 + 18^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769 + ... + 784.

212424 is an apocalyptic number.

It is an amenable number.

12424 is a deficient number, since it is larger than the sum of its proper divisors (10886).

12424 is a wasteful number, since it uses less digits than its factorization.

12424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1555 counting only the distinct ones).

The product of its digits is 64, while the sum is 13.

The square root of 12424 is about 111.4629983447. The cubic root of 12424 is about 23.1608137541.

The spelling of 12424 in words is "twelve thousand, four hundred twenty-four", and thus it is an iban number.

Divisors: 1 2 4 8 1553 3106 6212 12424