1616161 has 2 divisors, whose sum is σ = 1616162. Its totient is φ = 1616160.

The previous prime is 1616119. The next prime is 1616171.

1616161 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 28561 = 1260^2 + 169^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1616161 - 2⁷ = 1616033 is a prime.

It is a super-2 number, since 2×1616161² = 5223952755842, which contains 22 as substring.

It is a Chen prime.

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

1616161 is an undulating number in base 10.

It is not a weakly prime, because it can be changed into another prime (1616171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808080 + 808081.

It is an arithmetic number, because the mean of its divisors is an integer number (808081).

2^1616161 is an apocalyptic number.

It is an amenable number.

1616161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616161 is an equidigital number, since it uses as much as digits as its factorization.

1616161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 1616161 is about 1271.2832099890. The cubic root of 1616161 is about 117.3531831589.

The spelling of 1616161 in words is "one million, six hundred sixteen thousand, one hundred sixty-one".