1338187 has 4 divisors (see below), whose sum is σ = 1343296. Its totient is φ = 1333080.

The previous prime is 1338167. The next prime is 1338217. The reversal of 1338187 is 7818331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139 + ... + 2692.

It is an arithmetic number, because the mean of its divisors is an integer number (335824).

2^1338187 is an apocalyptic number.

1338187 is a deficient number, since it is larger than the sum of its proper divisors (5109).

1338187 is an equidigital number, since it uses as much as digits as its factorization.

1338187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108.

The product of its digits is 4032, while the sum is 31.

The square root of 1338187 is about 1156.8003284923. The cubic root of 1338187 is about 110.1976336856.

The spelling of 1338187 in words is "one million, three hundred thirty-eight thousand, one hundred eighty-seven".