2115801 has 12 divisors (see below), whose sum is σ = 3169712. Its totient is φ = 1410372.

The previous prime is 2115791. The next prime is 2115823. The reversal of 2115801 is 1085112.

It is not a de Polignac number, because 2115801 - 2¹¹ = 2113753 is a prime.

It is a super-2 number, since 2×2115801² = 8953227743202, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

2115801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2115101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4111 + ... + 4596.

2^2115801 is an apocalyptic number.

It is an amenable number.

2115801 is a deficient number, since it is larger than the sum of its proper divisors (1053911).

2115801 is an frugal number, since it uses more digits than its factorization.

2115801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722 (or 8710 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 2115801 is about 1454.5793206285. The cubic root of 2115801 is about 128.3782957462.

It can be divided in two parts, 2115 and 801, that added together give a square (2916 = 54²).

The spelling of 2115801 in words is "two million, one hundred fifteen thousand, eight hundred one".