1026661 has 2 divisors, whose sum is σ = 1026662. Its totient is φ = 1026660.

The previous prime is 1026593. The next prime is 1026667. The reversal of 1026661 is 1666201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 6561 = 1010^2 + 81^2 .

It is an emirp because it is prime and its reverse (1666201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1026661 - 2¹⁵ = 993893 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513330 + 513331.

It is an arithmetic number, because the mean of its divisors is an integer number (513331).

2^1026661 is an apocalyptic number.

It is an amenable number.

1026661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026661 is an equidigital number, since it uses as much as digits as its factorization.

1026661 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 1026661 is about 1013.2428139395. The cubic root of 1026661 is about 100.8809170644.

The spelling of 1026661 in words is "one million, twenty-six thousand, six hundred sixty-one".