1055981 has 2 divisors, whose sum is σ = 1055982. Its totient is φ = 1055980.

The previous prime is 1055969. The next prime is 1056007. The reversal of 1055981 is 1895501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586756 + 469225 = 766^2 + 685^2 .

It is an emirp because it is prime and its reverse (1895501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1055981 - 2⁶ = 1055917 is a prime.

It is a super-2 number, since 2×1055981² = 2230191744722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527990 + 527991.

It is an arithmetic number, because the mean of its divisors is an integer number (527991).

2^1055981 is an apocalyptic number.

It is an amenable number.

1055981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055981 is an equidigital number, since it uses as much as digits as its factorization.

1055981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1055981 is about 1027.6093615767. The cubic root of 1055981 is about 101.8322566495.

The spelling of 1055981 in words is "one million, fifty-five thousand, nine hundred eighty-one".