1601617 has 2 divisors, whose sum is σ = 1601618. Its totient is φ = 1601616.

The previous prime is 1601609. The next prime is 1601623. The reversal of 1601617 is 7161061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1560001 + 41616 = 1249^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601617 - 2³ = 1601609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800808 + 800809.

It is an arithmetic number, because the mean of its divisors is an integer number (800809).

2^1601617 is an apocalyptic number.

It is an amenable number.

1601617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601617 is an equidigital number, since it uses as much as digits as its factorization.

1601617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1601617 is about 1265.5500780293. The cubic root of 1601617 is about 117.0000974017. Note that the first 4 decimals are identical.

Adding to 1601617 its reverse (7161061), we get a palindrome (8762678).

It can be divided in two parts, 16016 and 17, that multiplied together give a palindrome (272272).

The spelling of 1601617 in words is "one million, six hundred one thousand, six hundred seventeen".