1816101 has 20 divisors (see below), whose sum is σ = 3101472. Its totient is φ = 1037448.

The previous prime is 1816099. The next prime is 1816117. The reversal of 1816101 is 1016181.

It is not a de Polignac number, because 1816101 - 2¹ = 1816099 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

1816101 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1035 + ... + 2168.

2^1816101 is an apocalyptic number.

It is an amenable number.

1816101 is a deficient number, since it is larger than the sum of its proper divisors (1285371).

1816101 is an equidigital number, since it uses as much as digits as its factorization.

1816101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222 (or 3213 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1816101 is about 1347.6279160065. The cubic root of 1816101 is about 122.0056657765.

The spelling of 1816101 in words is "one million, eight hundred sixteen thousand, one hundred one".