1002185172 has 72 divisors (see below), whose sum is σ = 2703296960. Its totient is φ = 312128640.

The previous prime is 1002185137. The next prime is 1002185189. The reversal of 1002185172 is 2715812001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39897 + ... + 59967.

Almost surely, 2^1002185172 is an apocalyptic number.

1002185172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002185172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351648480).

1002185172 is an abundant number, since it is smaller than the sum of its proper divisors (1701111788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002185172 is a wasteful number, since it uses less digits than its factorization.

1002185172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20173 (or 20168 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 1002185172 is about 31657.3083505215. The cubic root of 1002185172 is about 1000.7278607568.

Adding to 1002185172 its reverse (2715812001), we get a palindrome (3717997173).

The spelling of 1002185172 in words is "one billion, two million, one hundred eighty-five thousand, one hundred seventy-two".