1066401 has 12 divisors (see below), whose sum is σ = 1760512. Its totient is φ = 609336.

The previous prime is 1066399. The next prime is 1066409. The reversal of 1066401 is 1046601.

1066401 is a `hidden beast` number, since 1 + 0 + 664 + 0 + 1 = 666.

It is not a de Polignac number, because 1066401 - 2¹ = 1066399 is a prime.

It is a super-2 number, since 2×1066401² = 2274422185602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8401 + ... + 8526.

2^1066401 is an apocalyptic number.

It is an amenable number.

1066401 is a deficient number, since it is larger than the sum of its proper divisors (694111).

1066401 is a wasteful number, since it uses less digits than its factorization.

1066401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940 (or 16937 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1066401 is about 1032.6669356574. Note that the first 3 decimals coincide. The cubic root of 1066401 is about 102.1661076618.

The spelling of 1066401 in words is "one million, sixty-six thousand, four hundred one".