1386645 has 24 divisors (see below), whose sum is σ = 2406816. Its totient is φ = 681408.

The previous prime is 1386643. The next prime is 1386659. The reversal of 1386645 is 5466831.

1386645 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 1386645 - 2¹ = 1386643 is a prime.

It is an Ulam number.

1386645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2262 + ... + 2808.

It is an arithmetic number, because the mean of its divisors is an integer number (100284).

2^1386645 is an apocalyptic number.

1386645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1386645 is a deficient number, since it is larger than the sum of its proper divisors (1020171).

1386645 is a wasteful number, since it uses less digits than its factorization.

1386645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 568 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1386645 is about 1177.5589157235. The cubic root of 1386645 is about 111.5120406337.

The spelling of 1386645 in words is "one million, three hundred eighty-six thousand, six hundred forty-five".