12128357 has 2 divisors, whose sum is σ = 12128358. Its totient is φ = 12128356.

The previous prime is 12128339. The next prime is 12128381. The reversal of 12128357 is 75382121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6145441 + 5982916 = 2479^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 12128357 - 2¹⁶ = 12062821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12128387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064178 + 6064179.

It is an arithmetic number, because the mean of its divisors is an integer number (6064179).

Almost surely, 2^12128357 is an apocalyptic number.

It is an amenable number.

12128357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128357 is an equidigital number, since it uses as much as digits as its factorization.

12128357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 12128357 is about 3482.5790730434. The cubic root of 12128357 is about 229.7562445933.

The spelling of 12128357 in words is "twelve million, one hundred twenty-eight thousand, three hundred fifty-seven".