1238987 has 8 divisors (see below), whose sum is σ = 1307904. Its totient is φ = 1171368.

The previous prime is 1238947. The next prime is 1238989. The reversal of 1238987 is 7898321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1238987 - 2¹⁰ = 1237963 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1238987.

It is not an unprimeable number, because it can be changed into a prime (1238989) 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 in 7 ways as a sum of consecutive naturals, for example, 2108 + ... + 2630.

It is an arithmetic number, because the mean of its divisors is an integer number (163488).

2^1238987 is an apocalyptic number.

1238987 is a deficient number, since it is larger than the sum of its proper divisors (68917).

1238987 is a wasteful number, since it uses less digits than its factorization.

1238987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 24192, while the sum is 38.

The square root of 1238987 is about 1113.0979292048. The cubic root of 1238987 is about 107.4044436595.

The spelling of 1238987 in words is "one million, two hundred thirty-eight thousand, nine hundred eighty-seven".