1606106021 has 16 divisors (see below), whose sum is σ = 1741703040. Its totient is φ = 1472272320.

The previous prime is 1606105903. The next prime is 1606106053. The reversal of 1606106021 is 1206016061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606106021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606106321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575650 + ... + 1576668.

It is an arithmetic number, because the mean of its divisors is an integer number (108856440).

Almost surely, 2^1606106021 is an apocalyptic number.

It is an amenable number.

1606106021 is a deficient number, since it is larger than the sum of its proper divisors (135597019).

1606106021 is a wasteful number, since it uses less digits than its factorization.

1606106021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1606106021 is about 40076.2525817971. The cubic root of 1606106021 is about 1171.0930494306.

The spelling of 1606106021 in words is "one billion, six hundred six million, one hundred six thousand, twenty-one".