1606081 has 2 divisors, whose sum is σ = 1606082. Its totient is φ = 1606080.

The previous prime is 1606009. The next prime is 1606097. The reversal of 1606081 is 1806061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1461681 + 144400 = 1209^2 + 380^2 .

It is an emirp because it is prime and its reverse (1806061) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1809091 and 1909081.

It is a cyclic number.

It is not a de Polignac number, because 1606081 - 2¹⁹ = 1081793 is a prime.

It is a super-2 number, since 2×1606081² = 5158992357122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

1606081 is a lucky number.

It is equal to p₁₂₁₅₇₆ and since 1606081 and 121576 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (1606681) 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 as a sum of consecutive naturals, namely, 803040 + 803041.

It is an arithmetic number, because the mean of its divisors is an integer number (803041).

2^1606081 is an apocalyptic number.

It is an amenable number.

1606081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606081 is an equidigital number, since it uses as much as digits as its factorization.

1606081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1606081 is about 1267.3125107881. The cubic root of 1606081 is about 117.1086968041.

It can be divided in two parts, 160 and 6081, that added together give a square (6241 = 79²).

The spelling of 1606081 in words is "one million, six hundred six thousand, eighty-one".