1381347 has 16 divisors (see below), whose sum is σ = 2232960. Its totient is φ = 837000.

The previous prime is 1381337. The next prime is 1381349. The reversal of 1381347 is 7431831.

It is not a de Polignac number, because 1381347 - 2¹⁴ = 1364963 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

1381347 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381347.

It is not an unprimeable number, because it can be changed into a prime (1381349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2029 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (139560).

2^1381347 is an apocalyptic number.

1381347 is a deficient number, since it is larger than the sum of its proper divisors (851613).

1381347 is a wasteful number, since it uses less digits than its factorization.

1381347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4665 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1381347 is about 1175.3071938859. The cubic root of 1381347 is about 111.3698401401.

It can be divided in two parts, 1381 and 347, that added together give a cube (1728 = 12³).

The spelling of 1381347 in words is "one million, three hundred eighty-one thousand, three hundred forty-seven".