3719521 has 8 divisors (see below), whose sum is σ = 4031720. Its totient is φ = 3431376.

The previous prime is 3719519. The next prime is 3719531. The reversal of 3719521 is 1259173.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 2371600 = 1161^2 + 1540^2 .

It is not a de Polignac number, because 3719521 - 2¹ = 3719519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3719521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3719531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (503965).

Almost surely, 2^3719521 is an apocalyptic number.

It is an amenable number.

3719521 is a deficient number, since it is larger than the sum of its proper divisors (312199).

3719521 is an equidigital number, since it uses as much as digits as its factorization.

3719521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732 (or 1706 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 3719521 is about 1928.6059732356. The cubic root of 3719521 is about 154.9395671451.

It can be divided in two parts, 371952 and 1, that added together give a triangular number (371953 = T₈₆₂).

The spelling of 3719521 in words is "three million, seven hundred nineteen thousand, five hundred twenty-one".