1606161 has 4 divisors (see below), whose sum is σ = 2141552. Its totient is φ = 1070772.

The previous prime is 1606153. The next prime is 1606201. The reversal of 1606161 is 1616061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1606161 - 2³ = 1606153 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1606151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267691 + ... + 267696.

It is an arithmetic number, because the mean of its divisors is an integer number (535388).

2^1606161 is an apocalyptic number.

It is an amenable number.

1606161 is a deficient number, since it is larger than the sum of its proper divisors (535391).

1606161 is an equidigital number, since it uses as much as digits as its factorization.

1606161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535390.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1606161 is about 1267.3440732492. The cubic root of 1606161 is about 117.1106411934.

The spelling of 1606161 in words is "one million, six hundred six thousand, one hundred sixty-one".