1301606161 has 2 divisors, whose sum is σ = 1301606162. Its totient is φ = 1301606160.

The previous prime is 1301606123. The next prime is 1301606231. The reversal of 1301606161 is 1616061031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847916161 + 453690000 = 29119^2 + 21300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301606161 - 2¹⁵ = 1301573393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1301606261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650803080 + 650803081.

It is an arithmetic number, because the mean of its divisors is an integer number (650803081).

Almost surely, 2^1301606161 is an apocalyptic number.

It is an amenable number.

1301606161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301606161 is an equidigital number, since it uses as much as digits as its factorization.

1301606161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1301606161 is about 36077.7793246757. The cubic root of 1301606161 is about 1091.8421731253.

Adding to 1301606161 its reverse (1616061031), we get a palindrome (2917667192).

The spelling of 1301606161 in words is "one billion, three hundred one million, six hundred six thousand, one hundred sixty-one".