1605606201 has 12 divisors (see below), whose sum is σ = 2319780528. Its totient is φ = 1070140344.

The previous prime is 1605606173. The next prime is 1605606217. The reversal of 1605606201 is 1026065061.

It is a happy number.

It is not a de Polignac number, because 1605606201 - 2⁵ = 1605606169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1605608201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20986 + ... + 60428.

It is an arithmetic number, because the mean of its divisors is an integer number (193315044).

Almost surely, 2^1605606201 is an apocalyptic number.

It is an amenable number.

1605606201 is a deficient number, since it is larger than the sum of its proper divisors (714174327).

1605606201 is a wasteful number, since it uses less digits than its factorization.

1605606201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43972 (or 43969 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1605606201 is about 40070.0162340871. The cubic root of 1605606201 is about 1170.9715554882.

The spelling of 1605606201 in words is "one billion, six hundred five million, six hundred six thousand, two hundred one".