3721312 has 48 divisors (see below), whose sum is σ = 8618400. Its totient is φ = 1548288.

The previous prime is 3721303. The next prime is 3721327. The reversal of 3721312 is 2131273.

It is a self number, because there is not a number n which added to its sum of digits gives 3721312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8064 + ... + 8512.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

Almost surely, 2^3721312 is an apocalyptic number.

3721312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3721312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4309200).

3721312 is an abundant number, since it is smaller than the sum of its proper divisors (4897088).

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

3721312 is a wasteful number, since it uses less digits than its factorization.

3721312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 495 counting only the distinct ones).

The product of its digits is 252, while the sum is 19.

The square root of 3721312 is about 1929.0702423707. The cubic root of 3721312 is about 154.9644316583.

Adding to 3721312 its reverse (2131273), we get a palindrome (5852585).

It can be divided in two parts, 37 and 21312, that multiplied together give a square (788544 = 888²).

The spelling of 3721312 in words is "three million, seven hundred twenty-one thousand, three hundred twelve".