2055491 has 4 divisors (see below), whose sum is σ = 2126400. Its totient is φ = 1984584.

The previous prime is 2055481. The next prime is 2055497. The reversal of 2055491 is 1945502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2055491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2055491.

It is not an unprimeable number, because it can be changed into a prime (2055497) 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, 35411 + ... + 35468.

It is an arithmetic number, because the mean of its divisors is an integer number (531600).

2^2055491 is an apocalyptic number.

2055491 is a deficient number, since it is larger than the sum of its proper divisors (70909).

2055491 is an equidigital number, since it uses as much as digits as its factorization.

2055491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70908.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2055491 is about 1433.6983643710. The cubic root of 2055491 is about 127.1467293715.

The spelling of 2055491 in words is "two million, fifty-five thousand, four hundred ninety-one".