12280357 has 2 divisors, whose sum is σ = 12280358. Its totient is φ = 12280356.

The previous prime is 12280351. The next prime is 12280379. The reversal of 12280357 is 75308221.

12280357 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 3334276 = 2991^2 + 1826^2 .

It is a cyclic number.

It is not a de Polignac number, because 12280357 - 2²³ = 3891749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12280351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6140178 + 6140179.

It is an arithmetic number, because the mean of its divisors is an integer number (6140179).

Almost surely, 2^12280357 is an apocalyptic number.

It is an amenable number.

12280357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12280357 is an equidigital number, since it uses as much as digits as its factorization.

12280357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 12280357 is about 3504.3340308823. The cubic root of 12280357 is about 230.7120779520.

Adding to 12280357 its reverse (75308221), we get a palindrome (87588578).

The spelling of 12280357 in words is "twelve million, two hundred eighty thousand, three hundred fifty-seven".