2055691 has 8 divisors (see below), whose sum is σ = 2374704. Its totient is φ = 1758720.

The previous prime is 2055689. The next prime is 2055707. The reversal of 2055691 is 1965502.

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 2055691 - 2¹ = 2055689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2055611) 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, 5310 + ... + 5683.

It is an arithmetic number, because the mean of its divisors is an integer number (296838).

2^2055691 is an apocalyptic number.

2055691 is a deficient number, since it is larger than the sum of its proper divisors (319013).

2055691 is a wasteful number, since it uses less digits than its factorization.

2055691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11021.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2055691 is about 1433.7681123529. The cubic root of 2055691 is about 127.1508530450.

The spelling of 2055691 in words is "two million, fifty-five thousand, six hundred ninety-one".