12409357 has 2 divisors, whose sum is σ = 12409358. Its totient is φ = 12409356.

The previous prime is 12409349. The next prime is 12409373. The reversal of 12409357 is 75390421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8916196 + 3493161 = 2986^2 + 1869^2 .

It is an emirp because it is prime and its reverse (75390421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12409357 - 2³ = 12409349 is a prime.

It is a super-4 number, since 4×12409357⁴ (a number of 29 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12409387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6204678 + 6204679.

It is an arithmetic number, because the mean of its divisors is an integer number (6204679).

Almost surely, 2^12409357 is an apocalyptic number.

It is an amenable number.

12409357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12409357 is an equidigital number, since it uses as much as digits as its factorization.

12409357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 12409357 is about 3522.6917265069. The cubic root of 12409357 is about 231.5171101958.

Adding to 12409357 its reverse (75390421), we get a palindrome (87799778).

The spelling of 12409357 in words is "twelve million, four hundred nine thousand, three hundred fifty-seven".