2055561 has 8 divisors (see below), whose sum is σ = 2749440. Its totient is φ = 1366032.

The previous prime is 2055551. The next prime is 2055569. The reversal of 2055561 is 1655502.

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

It is not a de Polignac number, because 2055561 - 2⁶ = 2055497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2055569) 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, 255 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (343680).

2^2055561 is an apocalyptic number.

It is an amenable number.

2055561 is a deficient number, since it is larger than the sum of its proper divisors (693879).

2055561 is a wasteful number, since it uses less digits than its factorization.

2055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2055561 is about 1433.7227765506. The cubic root of 2055561 is about 127.1481726876.

The spelling of 2055561 in words is "two million, fifty-five thousand, five hundred sixty-one".