1381743 has 24 divisors (see below), whose sum is σ = 2308176. Its totient is φ = 787200.

The previous prime is 1381739. The next prime is 1381747. The reversal of 1381743 is 3471831.

It is an interprime number because it is at equal distance from previous prime (1381739) and next prime (1381747).

It is not a de Polignac number, because 1381743 - 2² = 1381739 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381747) 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, 1273 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (96174).

2^1381743 is an apocalyptic number.

1381743 is a deficient number, since it is larger than the sum of its proper divisors (926433).

1381743 is a wasteful number, since it uses less digits than its factorization.

1381743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 852 counting only the distinct ones).

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

The square root of 1381743 is about 1175.4756484079. The cubic root of 1381743 is about 111.3804815027.

It can be divided in two parts, 138 and 1743, that added together give a palindrome (1881).

The spelling of 1381743 in words is "one million, three hundred eighty-one thousand, seven hundred forty-three".