1021164085 has 16 divisors (see below), whose sum is σ = 1251202176. Its totient is φ = 799875648.

The previous prime is 1021164083. The next prime is 1021164107. The reversal of 1021164085 is 5804611201.

It is a cyclic number.

It is not a de Polignac number, because 1021164085 - 2¹ = 1021164083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021164083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46819 + ... + 65071.

It is an arithmetic number, because the mean of its divisors is an integer number (78200136).

Almost surely, 2^1021164085 is an apocalyptic number.

It is an amenable number.

1021164085 is a deficient number, since it is larger than the sum of its proper divisors (230038091).

1021164085 is a wasteful number, since it uses less digits than its factorization.

1021164085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18492.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1021164085 is about 31955.6581061946. The cubic root of 1021164085 is about 1007.0055033200.

Adding to 1021164085 its reverse (5804611201), we get a palindrome (6825775286).

The spelling of 1021164085 in words is "one billion, twenty-one million, one hundred sixty-four thousand, eighty-five".