1601161 has 2 divisors, whose sum is σ = 1601162. Its totient is φ = 1601160.

The previous prime is 1601147. The next prime is 1601203. The reversal of 1601161 is 1611061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 511225 = 1044^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601161 - 2⁹ = 1600649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800580 + 800581.

It is an arithmetic number, because the mean of its divisors is an integer number (800581).

2^1601161 is an apocalyptic number.

It is an amenable number.

1601161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601161 is an equidigital number, since it uses as much as digits as its factorization.

1601161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1601161 is about 1265.3699063910. The cubic root of 1601161 is about 116.9889925603.

The spelling of 1601161 in words is "one million, six hundred one thousand, one hundred sixty-one".