1308385 has 8 divisors (see below), whose sum is σ = 1690920. Its totient is φ = 966144.

The previous prime is 1308383. The next prime is 1308403. The reversal of 1308385 is 5838031.

It can be written as a sum of positive squares in 4 ways, for example, as 159201 + 1149184 = 399^2 + 1072^2 .

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 1308385 - 2¹ = 1308383 is a prime.

1308385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1308383) 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, 10000 + ... + 10129.

It is an arithmetic number, because the mean of its divisors is an integer number (211365).

2^1308385 is an apocalyptic number.

It is an amenable number.

1308385 is a deficient number, since it is larger than the sum of its proper divisors (382535).

1308385 is a wasteful number, since it uses less digits than its factorization.

1308385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20147.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1308385 is about 1143.8465806217. The cubic root of 1308385 is about 109.3734350797.

It can be divided in two parts, 130 and 8385, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 1308385 in words is "one million, three hundred eight thousand, three hundred eighty-five".