4009212 has 36 divisors (see below), whose sum is σ = 10732176. Its totient is φ = 1257600.

The previous prime is 4009207. The next prime is 4009219. The reversal of 4009212 is 2129004.

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).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009219) 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, 2664 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (298116).

Almost surely, 2^4009212 is an apocalyptic number.

It is an amenable number.

4009212 is an abundant number, since it is smaller than the sum of its proper divisors (6722964).

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

4009212 is a wasteful number, since it uses less digits than its factorization.

4009212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578 (or 6573 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 4009212 is about 2002.3016755724. The cubic root of 4009212 is about 158.8618712563.

It can be divided in two parts, 40092 and 12, that added together give a palindrome (40104).

The spelling of 4009212 in words is "four million, nine thousand, two hundred twelve".