2172012 has 12 divisors (see below), whose sum is σ = 5068056. Its totient is φ = 724000.

The previous prime is 2172007. The next prime is 2172031. The reversal of 2172012 is 2102712.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2172012² = 9435272256288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2171982 and 2172000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90489 + ... + 90512.

It is an arithmetic number, because the mean of its divisors is an integer number (422338).

2^2172012 is an apocalyptic number.

It is an amenable number.

2172012 is an abundant number, since it is smaller than the sum of its proper divisors (2896044).

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

2172012 is a wasteful number, since it uses less digits than its factorization.

2172012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181008 (or 181006 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 2172012 is about 1473.7747453393. The cubic root of 2172012 is about 129.5052595967.

Adding to 2172012 its reverse (2102712), we get a palindrome (4274724).

The spelling of 2172012 in words is "two million, one hundred seventy-two thousand, twelve".