4055691 has 4 divisors (see below), whose sum is σ = 5407592. Its totient is φ = 2703792.

The previous prime is 4055687. The next prime is 4055747. The reversal of 4055691 is 1965504.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4055691 - 2² = 4055687 is a prime.

It is a D-number.

It is a Duffinian number.

4055691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4055651) 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, 675946 + ... + 675951.

It is an arithmetic number, because the mean of its divisors is an integer number (1351898).

Almost surely, 2^4055691 is an apocalyptic number.

4055691 is a deficient number, since it is larger than the sum of its proper divisors (1351901).

4055691 is a wasteful number, since it uses less digits than its factorization.

4055691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351900.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 4055691 is about 2013.8746237043. The cubic root of 4055691 is about 159.4734120375.

The spelling of 4055691 in words is "four million, fifty-five thousand, six hundred ninety-one".