2186401 has 4 divisors (see below), whose sum is σ = 2498752. Its totient is φ = 1874052.

The previous prime is 2186389. The next prime is 2186453. The reversal of 2186401 is 1046812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2186401 - 2⁵ = 2186369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2186491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156165 + ... + 156178.

It is an arithmetic number, because the mean of its divisors is an integer number (624688).

2^2186401 is an apocalyptic number.

It is an amenable number.

2186401 is a deficient number, since it is larger than the sum of its proper divisors (312351).

2186401 is an equidigital number, since it uses as much as digits as its factorization.

2186401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312350.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2186401 is about 1478.6483692887. The cubic root of 2186401 is about 129.7906096627.

The spelling of 2186401 in words is "two million, one hundred eighty-six thousand, four hundred one".