3721212 has 36 divisors (see below), whose sum is σ = 10262616. Its totient is φ = 1127520.

The previous prime is 3721199. The next prime is 3721213. The reversal of 3721212 is 2121273.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

3721212 is a modest number, since divided by 1212 gives 372 as remainder.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4303 + ... + 5094.

Almost surely, 2^3721212 is an apocalyptic number.

It is an amenable number.

3721212 is an abundant number, since it is smaller than the sum of its proper divisors (6541404).

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

3721212 is a wasteful number, since it uses less digits than its factorization.

3721212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418 (or 9413 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 3721212 is about 1929.0443229745. The cubic root of 3721212 is about 154.9630435652.

Adding to 3721212 its reverse (2121273), we get a palindrome (5842485).

The spelling of 3721212 in words is "three million, seven hundred twenty-one thousand, two hundred twelve".