1338405 has 8 divisors (see below), whose sum is σ = 2141472. Its totient is φ = 713808.

The previous prime is 1338397. The next prime is 1338413. The reversal of 1338405 is 5048331.

It is an interprime number because it is at equal distance from previous prime (1338397) and next prime (1338413).

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

It is not a de Polignac number, because 1338405 - 2³ = 1338397 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44599 + ... + 44628.

It is an arithmetic number, because the mean of its divisors is an integer number (267684).

2^1338405 is an apocalyptic number.

1338405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1338405 is a deficient number, since it is larger than the sum of its proper divisors (803067).

1338405 is an equidigital number, since it uses as much as digits as its factorization.

1338405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89235.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1338405 is about 1156.8945500779. The cubic root of 1338405 is about 110.2036173485.

The spelling of 1338405 in words is "one million, three hundred thirty-eight thousand, four hundred five".