1605211201 has 8 divisors (see below), whose sum is σ = 1752408000. Its totient is φ = 1458225840.

The previous prime is 1605211189. The next prime is 1605211229. The reversal of 1605211201 is 1021125061.

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

It is a cyclic number.

It is not a de Polignac number, because 1605211201 - 2¹¹ = 1605209153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605211241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36766 + ... + 67543.

It is an arithmetic number, because the mean of its divisors is an integer number (219051000).

Almost surely, 2^1605211201 is an apocalyptic number.

1605211201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1605211201 is a deficient number, since it is larger than the sum of its proper divisors (147196799).

1605211201 is a wasteful number, since it uses less digits than its factorization.

1605211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105719.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1605211201 is about 40065.0870584353. The cubic root of 1605211201 is about 1170.8755228705.

Adding to 1605211201 its reverse (1021125061), we get a palindrome (2626336262).

The spelling of 1605211201 in words is "one billion, six hundred five million, two hundred eleven thousand, two hundred one".