2091601 has 8 divisors (see below), whose sum is σ = 2182400. Its totient is φ = 2002320.

The previous prime is 2091599. The next prime is 2091613. The reversal of 2091601 is 1061902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091601 - 2¹ = 2091599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2091631) 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 7 ways as a sum of consecutive naturals, for example, 3070 + ... + 3688.

It is an arithmetic number, because the mean of its divisors is an integer number (272800).

2^2091601 is an apocalyptic number.

It is an amenable number.

2091601 is a deficient number, since it is larger than the sum of its proper divisors (90799).

2091601 is a wasteful number, since it uses less digits than its factorization.

2091601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 2091601 is about 1446.2368409082. The cubic root of 2091601 is about 127.8869648253.

The spelling of 2091601 in words is "two million, ninety-one thousand, six hundred one".