12240857 has 2 divisors, whose sum is σ = 12240858. Its totient is φ = 12240856.

The previous prime is 12240847. The next prime is 12240869. The reversal of 12240857 is 75804221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11262736 + 978121 = 3356^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 12240857 - 2⁴ = 12240841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12240847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6120428 + 6120429.

It is an arithmetic number, because the mean of its divisors is an integer number (6120429).

Almost surely, 2^12240857 is an apocalyptic number.

It is an amenable number.

12240857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12240857 is an equidigital number, since it uses as much as digits as its factorization.

12240857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12240857 is about 3498.6936133363. The cubic root of 12240857 is about 230.4644490102.

The spelling of 12240857 in words is "twelve million, two hundred forty thousand, eight hundred fifty-seven".