2090401 has 4 divisors (see below), whose sum is σ = 2181312. Its totient is φ = 1999492.

The previous prime is 2090381. The next prime is 2090441. The reversal of 2090401 is 1040902.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1040902 = 2 ⋅520451.

It is a cyclic number.

It is not a de Polignac number, because 2090401 - 2⁹ = 2089889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2090441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45421 + ... + 45466.

It is an arithmetic number, because the mean of its divisors is an integer number (545328).

2^2090401 is an apocalyptic number.

It is an amenable number.

2090401 is a deficient number, since it is larger than the sum of its proper divisors (90911).

2090401 is an equidigital number, since it uses as much as digits as its factorization.

2090401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90910.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2090401 is about 1445.8219115783. The cubic root of 2090401 is about 127.8625029074.

The spelling of 2090401 in words is "two million, ninety thousand, four hundred one".