12123572 has 6 divisors (see below), whose sum is σ = 21216258. Its totient is φ = 6061784.

The previous prime is 12123571. The next prime is 12123589. The reversal of 12123572 is 27532121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 1008016 = 3334^2 + 1004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515443 + ... + 1515450.

It is an arithmetic number, because the mean of its divisors is an integer number (3536043).

Almost surely, 2^12123572 is an apocalyptic number.

It is an amenable number.

12123572 is a deficient number, since it is larger than the sum of its proper divisors (9092686).

12123572 is a wasteful number, since it uses less digits than its factorization.

12123572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030897 (or 3030895 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 12123572 is about 3481.8920144083. The cubic root of 12123572 is about 229.7260253795.

Adding to 12123572 its reverse (27532121), we get a palindrome (39655693).

The spelling of 12123572 in words is "twelve million, one hundred twenty-three thousand, five hundred seventy-two".