1023381 has 16 divisors (see below), whose sum is σ = 1569600. Its totient is φ = 658224.

The previous prime is 1023367. The next prime is 1023389. The reversal of 1023381 is 1833201.

It is not a de Polignac number, because 1023381 - 2⁶ = 1023317 is a prime.

It is a super-2 number, since 2×1023381² = 2094617342322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023389) 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 15 ways as a sum of consecutive naturals, for example, 130 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (98100).

2^1023381 is an apocalyptic number.

It is an amenable number.

1023381 is a deficient number, since it is larger than the sum of its proper divisors (546219).

1023381 is a wasteful number, since it uses less digits than its factorization.

1023381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1339 counting only the distinct ones).

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

The square root of 1023381 is about 1011.6229534762. The cubic root of 1023381 is about 100.7733702330.

Adding to 1023381 its reverse (1833201), we get a palindrome (2856582).

The spelling of 1023381 in words is "one million, twenty-three thousand, three hundred eighty-one".