12667537 has 2 divisors, whose sum is σ = 12667538. Its totient is φ = 12667536.

The previous prime is 12667531. The next prime is 12667553. The reversal of 12667537 is 73576621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10246401 + 2421136 = 3201^2 + 1556^2 .

It is an emirp because it is prime and its reverse (73576621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12667537 is a prime.

It is a Chen prime.

It is equal to p₈₂₈₉₂₈ and since 12667537 and 828928 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 12667496 and 12667505.

It is not a weakly prime, because it can be changed into another prime (12667531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333768 + 6333769.

It is an arithmetic number, because the mean of its divisors is an integer number (6333769).

Almost surely, 2^12667537 is an apocalyptic number.

It is an amenable number.

12667537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12667537 is an equidigital number, since it uses as much as digits as its factorization.

12667537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 12667537 is about 3559.1483531879. The cubic root of 12667537 is about 233.1116940705. Note that the first 3 decimals are identical.

The spelling of 12667537 in words is "twelve million, six hundred sixty-seven thousand, five hundred thirty-seven".