1618161 has 12 divisors (see below), whose sum is σ = 2208816. Its totient is φ = 1053640.

The previous prime is 1618153. The next prime is 1618181.

1618161 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1618161 - 2³ = 1618153 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

1618161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1618181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15070 + ... + 15176.

It is an arithmetic number, because the mean of its divisors is an integer number (184068).

2^1618161 is an apocalyptic number.

It is an amenable number.

1618161 is a deficient number, since it is larger than the sum of its proper divisors (590655).

1618161 is an equidigital number, since it uses as much as digits as its factorization.

1618161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 181 counting only the distinct ones).

The product of its digits is 288, while the sum is 24.

The square root of 1618161 is about 1272.0695735690. The cubic root of 1618161 is about 117.4015714107.

The spelling of 1618161 in words is "one million, six hundred eighteen thousand, one hundred sixty-one".