1001816 has 16 divisors (see below), whose sum is σ = 1899240. Its totient is φ = 495360.

The previous prime is 1001809. The next prime is 1001821. The reversal of 1001816 is 6181001.

It is a happy number.

1001816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1001794 and 1001803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 1421.

2^1001816 is an apocalyptic number.

It is an amenable number.

1001816 is a deficient number, since it is larger than the sum of its proper divisors (897424).

1001816 is a wasteful number, since it uses less digits than its factorization.

1001816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1001816 is about 1000.9075881419. The cubic root of 1001816 is about 100.0604967274.

Adding to 1001816 its reverse (6181001), we get a palindrome (7182817).

The spelling of 1001816 in words is "one million, one thousand, eight hundred sixteen".