1381684 has 12 divisors (see below), whose sum is σ = 2440900. Its totient is φ = 684288.

The previous prime is 1381649. The next prime is 1381693. The reversal of 1381684 is 4861831.

It can be written as a sum of positive squares in 2 ways, for example, as 1056784 + 324900 = 1028^2 + 570^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149 + ... + 2020.

2^1381684 is an apocalyptic number.

It is an amenable number.

1381684 is a deficient number, since it is larger than the sum of its proper divisors (1059216).

1381684 is a wasteful number, since it uses less digits than its factorization.

1381684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282 (or 3280 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 1381684 is about 1175.4505519162. The cubic root of 1381684 is about 111.3788961760.

The spelling of 1381684 in words is "one million, three hundred eighty-one thousand, six hundred eighty-four".