1066621 has 2 divisors, whose sum is σ = 1066622. Its totient is φ = 1066620.

The previous prime is 1066619. The next prime is 1066643. The reversal of 1066621 is 1266601.

It is an a-pointer prime, because the next prime (1066643) can be obtained adding 1066621 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881721 + 184900 = 939^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066621 - 2¹ = 1066619 is a prime.

It is a super-2 number, since 2×1066621² = 2275360715282, which contains 22 as substring.

Together with 1066619, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1066592 and 1066601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533310 + 533311.

It is an arithmetic number, because the mean of its divisors is an integer number (533311).

2^1066621 is an apocalyptic number.

It is an amenable number.

1066621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066621 is an equidigital number, since it uses as much as digits as its factorization.

1066621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1066621 is about 1032.7734504721. The cubic root of 1066621 is about 102.1731328484.

The spelling of 1066621 in words is "one million, sixty-six thousand, six hundred twenty-one".