12123751 has 2 divisors, whose sum is σ = 12123752. Its totient is φ = 12123750.

The previous prime is 12123731. The next prime is 12123757. The reversal of 12123751 is 15732121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12123751 - 2⁹ = 12123239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12123757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061875 + 6061876.

It is an arithmetic number, because the mean of its divisors is an integer number (6061876).

Almost surely, 2^12123751 is an apocalyptic number.

12123751 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123751 is an equidigital number, since it uses as much as digits as its factorization.

12123751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 22.

The square root of 12123751 is about 3481.9177187291. The cubic root of 12123751 is about 229.7271559801.

Adding to 12123751 its reverse (15732121), we get a palindrome (27855872).

The spelling of 12123751 in words is "twelve million, one hundred twenty-three thousand, seven hundred fifty-one".