1066981 has 2 divisors, whose sum is σ = 1066982. Its totient is φ = 1066980.

The previous prime is 1066979. The next prime is 1066987. The reversal of 1066981 is 1896601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 410881 = 810^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066981 - 2¹ = 1066979 is a prime.

It is a super-2 number, since 2×1066981² = 2276896908722, which contains 22 as substring.

Together with 1066979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533490 + 533491.

It is an arithmetic number, because the mean of its divisors is an integer number (533491).

2^1066981 is an apocalyptic number.

It is an amenable number.

1066981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066981 is an equidigital number, since it uses as much as digits as its factorization.

1066981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1066981 is about 1032.9477237499. The cubic root of 1066981 is about 102.1846265250.

The spelling of 1066981 in words is "one million, sixty-six thousand, nine hundred eighty-one".