1612161 has 24 divisors (see below), whose sum is σ = 2535624. Its totient is φ = 983040.

The previous prime is 1612157. The next prime is 1612181.

1612161 is nontrivially palindromic in base 10 and base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 497025 + 1115136 = 705^2 + 1056^2 .

It is not a de Polignac number, because 1612161 - 2² = 1612157 is a prime.

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

1612161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1612111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6145 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (105651).

2^1612161 is an apocalyptic number.

It is an amenable number.

1612161 is a deficient number, since it is larger than the sum of its proper divisors (923463).

1612161 is a wasteful number, since it uses less digits than its factorization.

1612161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 318 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1612161 is about 1269.7090217841. The cubic root of 1612161 is about 117.2562867623.

The spelling of 1612161 in words is "one million, six hundred twelve thousand, one hundred sixty-one".