12705397 has 2 divisors, whose sum is σ = 12705398. Its totient is φ = 12705396.

The previous prime is 12705377. The next prime is 12705401. The reversal of 12705397 is 79350721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 1887876 = 3289^2 + 1374^2 .

It is a cyclic number.

It is not a de Polignac number, because 12705397 - 2²³ = 4316789 is a prime.

It is a super-2 number, since 2×12705397² = 322854225855218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12705317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352698 + 6352699.

It is an arithmetic number, because the mean of its divisors is an integer number (6352699).

Almost surely, 2^12705397 is an apocalyptic number.

It is an amenable number.

12705397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705397 is an equidigital number, since it uses as much as digits as its factorization.

12705397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 12705397 is about 3564.4630731710. The cubic root of 12705397 is about 233.3436999929.

The spelling of 12705397 in words is "twelve million, seven hundred five thousand, three hundred ninety-seven".