1601601 has 8 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 1060272.

The previous prime is 1601599. The next prime is 1601609. The reversal of 1601601 is 1061061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1601601 - 2¹ = 1601599 is a prime.

1601601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1601609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (268800).

2^1601601 is an apocalyptic number.

It is an amenable number.

1601601 is a deficient number, since it is larger than the sum of its proper divisors (548799).

1601601 is a wasteful number, since it uses less digits than its factorization.

1601601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1601601 is about 1265.5437566517. The cubic root of 1601601 is about 116.9997077938. Note that the first 3 decimals are identical.

Adding to 1601601 its reverse (1061061), we get a palindrome (2662662).

The spelling of 1601601 in words is "one million, six hundred one thousand, six hundred one".