3213612 has 72 divisors (see below), whose sum is σ = 8845200. Its totient is φ = 979968.

The previous prime is 3213599. The next prime is 3213619. The reversal of 3213612 is 2163123.

3213612 = T₂₂₃ + T₂₂₄ + ... + T₃₁₁.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36064 + ... + 36152.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

Almost surely, 2^3213612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3213612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4422600).

3213612 is an abundant number, since it is smaller than the sum of its proper divisors (5631588).

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

3213612 is a wasteful number, since it uses less digits than its factorization.

3213612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 170 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 3213612 is about 1792.6550142177. The cubic root of 3213612 is about 147.5699103623.

Adding to 3213612 its reverse (2163123), we get a palindrome (5376735).

The spelling of 3213612 in words is "three million, two hundred thirteen thousand, six hundred twelve".