1063661 has 2 divisors, whose sum is σ = 1063662. Its totient is φ = 1063660.

The previous prime is 1063649. The next prime is 1063693. The reversal of 1063661 is 1663601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988036 + 75625 = 994^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1063661 - 2⁶ = 1063597 is a prime.

It is a super-2 number, since 2×1063661² = 2262749445842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1063561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531830 + 531831.

It is an arithmetic number, because the mean of its divisors is an integer number (531831).

2^1063661 is an apocalyptic number.

It is an amenable number.

1063661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1063661 is an equidigital number, since it uses as much as digits as its factorization.

1063661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1063661 is about 1031.3394203656. The cubic root of 1063661 is about 102.0785310898.

The spelling of 1063661 in words is "one million, sixty-three thousand, six hundred sixty-one".