11810001 has 16 divisors (see below), whose sum is σ = 18944000. Its totient is φ = 6393168.

The previous prime is 11809999. The next prime is 11810003. The reversal of 11810001 is 10001811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11809999) and next prime (11810003).

It is not a de Polignac number, because 11810001 - 2¹ = 11809999 is a prime.

It is a super-2 number, since 2×11810001² = 278952247240002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11810003) 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, 14401 + ... + 15198.

It is an arithmetic number, because the mean of its divisors is an integer number (1184000).

Almost surely, 2^11810001 is an apocalyptic number.

It is an amenable number.

11810001 is a deficient number, since it is larger than the sum of its proper divisors (7133999).

11810001 is a wasteful number, since it uses less digits than its factorization.

11810001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29628.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 11810001 is about 3436.5682009819. The cubic root of 11810001 is about 227.7281115763.

Adding to 11810001 its reverse (10001811), we get a palindrome (21811812).

The spelling of 11810001 in words is "eleven million, eight hundred ten thousand, one".