1012005172 has 36 divisors (see below), whose sum is σ = 1925160160. Its totient is φ = 465139584.

The previous prime is 1012005157. The next prime is 1012005187. The reversal of 1012005172 is 2715002101.

It is an interprime number because it is at equal distance from previous prime (1012005157) and next prime (1012005187).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39529 + ... + 59887.

Almost surely, 2^1012005172 is an apocalyptic number.

It is an amenable number.

1012005172 is a deficient number, since it is larger than the sum of its proper divisors (913154988).

1012005172 is a wasteful number, since it uses less digits than its factorization.

1012005172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20440 (or 20421 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1012005172 is about 31812.0287312834. The cubic root of 1012005172 is about 1003.9858161623.

Adding to 1012005172 its reverse (2715002101), we get a palindrome (3727007273).

The spelling of 1012005172 in words is "one billion, twelve million, five thousand, one hundred seventy-two".