1338765 has 16 divisors (see below), whose sum is σ = 2160000. Its totient is φ = 708032.

The previous prime is 1338751. The next prime is 1338781. The reversal of 1338765 is 5678331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1338765 - 2⁴ = 1338749 is a prime.

Its product of digits (15120) is a multiple of the sum of its prime divisors (756).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1936 + ... + 2534.

It is an arithmetic number, because the mean of its divisors is an integer number (135000).

2^1338765 is an apocalyptic number.

1338765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1338765 is a deficient number, since it is larger than the sum of its proper divisors (821235).

1338765 is a wasteful number, since it uses less digits than its factorization.

1338765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 15120, while the sum is 33.

The square root of 1338765 is about 1157.0501285597. The cubic root of 1338765 is about 110.2134972044.

The spelling of 1338765 in words is "one million, three hundred thirty-eight thousand, seven hundred sixty-five".