1055881 has 2 divisors, whose sum is σ = 1055882. Its totient is φ = 1055880.

The previous prime is 1055867. The next prime is 1055893. The reversal of 1055881 is 1885501.

It is the 420-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 95481 = 980^2 + 309^2 .

It is an emirp because it is prime and its reverse (1885501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1055881 - 2¹³ = 1047689 is a prime.

It is a super-2 number, since 2×1055881² = 2229769372322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527940 + 527941.

It is an arithmetic number, because the mean of its divisors is an integer number (527941).

2^1055881 is an apocalyptic number.

It is an amenable number.

1055881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055881 is an equidigital number, since it uses as much as digits as its factorization.

1055881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 1055881 is about 1027.5607038029. The cubic root of 1055881 is about 101.8290420881.

It can be divided in two parts, 1055 and 881, that added together give a square (1936 = 44²).

The spelling of 1055881 in words is "one million, fifty-five thousand, eight hundred eighty-one".