1381023 has 16 divisors (see below), whose sum is σ = 2338560. Its totient is φ = 789048.

The previous prime is 1380997. The next prime is 1381027. The reversal of 1381023 is 3201831.

It is not a de Polignac number, because 1381023 - 2⁶ = 1380959 is a prime.

1381023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1380987 and 1381005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381027) 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, 3465 + ... + 3842.

It is an arithmetic number, because the mean of its divisors is an integer number (146160).

2^1381023 is an apocalyptic number.

1381023 is a deficient number, since it is larger than the sum of its proper divisors (957537).

1381023 is an equidigital number, since it uses as much as digits as its factorization.

1381023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323 (or 7317 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1381023 is about 1175.1693494982. The cubic root of 1381023 is about 111.3611320578.

Adding to 1381023 its reverse (3201831), we get a palindrome (4582854).

The spelling of 1381023 in words is "one million, three hundred eighty-one thousand, twenty-three".