1003681 has 8 divisors (see below), whose sum is σ = 1157120. Its totient is φ = 852768.

The previous prime is 1003679. The next prime is 1003693. The reversal of 1003681 is 1863001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1003681 - 2¹ = 1003679 is a prime.

It is a super-2 number, since 2×1003681² = 2014751099522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (144640).

2^1003681 is an apocalyptic number.

It is an amenable number.

1003681 is a deficient number, since it is larger than the sum of its proper divisors (153439).

1003681 is a wasteful number, since it uses less digits than its factorization.

1003681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1003681 is about 1001.8388093900. The cubic root of 1003681 is about 100.1225497542.

Adding to 1003681 its reverse (1863001), we get a palindrome (2866682).

The spelling of 1003681 in words is "one million, three thousand, six hundred eighty-one".