12256987 has 2 divisors, whose sum is σ = 12256988. Its totient is φ = 12256986.

The previous prime is 12256969. The next prime is 12257009. The reversal of 12256987 is 78965221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12256987 is a prime.

It is not a weakly prime, because it can be changed into another prime (12256927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128493 + 6128494.

It is an arithmetic number, because the mean of its divisors is an integer number (6128494).

Almost surely, 2^12256987 is an apocalyptic number.

12256987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12256987 is an equidigital number, since it uses as much as digits as its factorization.

12256987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 12256987 is about 3500.9980005707. The cubic root of 12256987 is about 230.5656336449.

The spelling of 12256987 in words is "twelve million, two hundred fifty-six thousand, nine hundred eighty-seven".