123512 has 8 divisors (see below), whose sum is σ = 231600. Its totient is φ = 61752.

The previous prime is 123503. The next prime is 123517. The reversal of 123512 is 215321.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123517) by changing a digit.

123512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7712 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (28950).

2¹²³⁵¹² is an apocalyptic number.

It is an amenable number.

123512 is a deficient number, since it is larger than the sum of its proper divisors (108088).

123512 is a wasteful number, since it uses less digits than its factorization.

123512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15445 (or 15441 counting only the distinct ones).

The product of its digits is 60, while the sum is 14.

The square root of 123512 is about 351.4427407132. The cubic root of 123512 is about 49.8008075008.

Adding to 123512 its reverse (215321), we get a palindrome (338833).

Subtracting 123512 from its reverse (215321), we obtain a square (91809 = 303²).

The spelling of 123512 in words is "one hundred twenty-three thousand, five hundred twelve".