1238687 has 2 divisors, whose sum is σ = 1238688. Its totient is φ = 1238686.

The previous prime is 1238683. The next prime is 1238693. The reversal of 1238687 is 7868321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1238687 - 2² = 1238683 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238681) 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, 619343 + 619344.

It is an arithmetic number, because the mean of its divisors is an integer number (619344).

2^1238687 is an apocalyptic number.

1238687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238687 is an equidigital number, since it uses as much as digits as its factorization.

1238687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 1238687 is about 1112.9631620139. The cubic root of 1238687 is about 107.3957742293.

The spelling of 1238687 in words is "one million, two hundred thirty-eight thousand, six hundred eighty-seven".