1396647 has 18 divisors (see below), whose sum is σ = 2347488. Its totient is φ = 797832.

The previous prime is 1396627. The next prime is 1396657. The reversal of 1396647 is 7466931.

1396647 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 647 = 666.

It is not a de Polignac number, because 1396647 - 2¹⁰ = 1395623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396607) 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 17 ways as a sum of consecutive naturals, for example, 1143 + ... + 2024.

It is an arithmetic number, because the mean of its divisors is an integer number (130416).

2^1396647 is an apocalyptic number.

1396647 is a deficient number, since it is larger than the sum of its proper divisors (950841).

1396647 is a wasteful number, since it uses less digits than its factorization.

1396647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187 (or 3177 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1396647 is about 1181.7982061249. The cubic root of 1396647 is about 111.7795141478.

It can be divided in two parts, 139 and 6647, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 1396647 in words is "one million, three hundred ninety-six thousand, six hundred forty-seven".