12685537 has 2 divisors, whose sum is σ = 12685538. Its totient is φ = 12685536.

The previous prime is 12685513. The next prime is 12685567. The reversal of 12685537 is 73558621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 40401 = 3556^2 + 201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12685537 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12685496 and 12685505.

It is not a weakly prime, because it can be changed into another prime (12685567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6342768 + 6342769.

It is an arithmetic number, because the mean of its divisors is an integer number (6342769).

Almost surely, 2^12685537 is an apocalyptic number.

It is an amenable number.

12685537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12685537 is an equidigital number, since it uses as much as digits as its factorization.

12685537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 12685537 is about 3561.6761503539. The cubic root of 12685537 is about 233.2220555563. Note that the first 3 decimals are identical.

The spelling of 12685537 in words is "twelve million, six hundred eighty-five thousand, five hundred thirty-seven".