312123 has 16 divisors (see below), whose sum is σ = 483840. Its totient is φ = 175296.

The previous prime is 312121. The next prime is 312161. The reversal of 312123 is 321213.

It is a happy number.

It is not a de Polignac number, because 312123 - 2¹ = 312121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312099 and 312108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121) 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, 1786 + ... + 1952.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2³¹²¹²³ is an apocalyptic number.

312123 is a deficient number, since it is larger than the sum of its proper divisors (171717).

312123 is a wasteful number, since it uses less digits than its factorization.

312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its digits is 36, while the sum is 12.

The square root of 312123 is about 558.6796935633. The cubic root of 312123 is about 67.8331404886.

Adding to 312123 its reverse (321213), we get a palindrome (633336).

It can be divided in two parts, 31212 and 3, that multiplied together give a square (93636 = 306²).

The spelling of 312123 in words is "three hundred twelve thousand, one hundred twenty-three", and thus it is an iban number.