1386647 has 4 divisors (see below), whose sum is σ = 1446960. Its totient is φ = 1326336.

The previous prime is 1386643. The next prime is 1386659. The reversal of 1386647 is 7466831.

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

It is a cyclic number.

It is not a de Polignac number, because 1386647 - 2² = 1386643 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 30122 + ... + 30167.

It is an arithmetic number, because the mean of its divisors is an integer number (361740).

2^1386647 is an apocalyptic number.

1386647 is a deficient number, since it is larger than the sum of its proper divisors (60313).

1386647 is an equidigital number, since it uses as much as digits as its factorization.

1386647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60312.

The product of its digits is 24192, while the sum is 35.

The square root of 1386647 is about 1177.5597649376. The cubic root of 1386647 is about 111.5120942460.

The spelling of 1386647 in words is "one million, three hundred eighty-six thousand, six hundred forty-seven".