123412 has 6 divisors (see below), whose sum is σ = 215978. Its totient is φ = 61704.

The previous prime is 123407. The next prime is 123419. The reversal of 123412 is 214321.

It can be written as a sum of positive squares in only one way, i.e., 81796 + 41616 = 286^2 + 204^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 123392 and 123401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123419) by changing a digit.

123412 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15423 + ... + 15430.

2¹²³⁴¹² is an apocalyptic number.

It is an amenable number.

123412 is a deficient number, since it is larger than the sum of its proper divisors (92566).

123412 is a wasteful number, since it uses less digits than its factorization.

123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30857 (or 30855 counting only the distinct ones).

The product of its digits is 48, while the sum is 13.

The square root of 123412 is about 351.3004412181. The cubic root of 123412 is about 49.7873636643.

Adding to 123412 its reverse (214321), we get a palindrome (337733).

Subtracting 123412 from its reverse (214321), we obtain a palindrome (90909).

It can be divided in two parts, 123 and 412, that added together give a palindrome (535).

The spelling of 123412 in words is "one hundred twenty-three thousand, four hundred twelve", and thus it is an iban number.