1606502201 has 4 divisors (see below), whose sum is σ = 1608614004. Its totient is φ = 1604390400.

The previous prime is 1606502197. The next prime is 1606502203. The reversal of 1606502201 is 1022056061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67980025 + 1538522176 = 8245^2 + 39224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606502201 - 2² = 1606502197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606502203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054760 + ... + 1056281.

It is an arithmetic number, because the mean of its divisors is an integer number (402153501).

Almost surely, 2^1606502201 is an apocalyptic number.

It is an amenable number.

1606502201 is a deficient number, since it is larger than the sum of its proper divisors (2111803).

1606502201 is an equidigital number, since it uses as much as digits as its factorization.

1606502201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111802.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1606502201 is about 40081.1951044377. The cubic root of 1606502201 is about 1171.1893331327.

Adding to 1606502201 its reverse (1022056061), we get a palindrome (2628558262).

The spelling of 1606502201 in words is "one billion, six hundred six million, five hundred two thousand, two hundred one".