3703521 has 8 divisors (see below), whose sum is σ = 4974624. Its totient is φ = 2450720.

The previous prime is 3703507. The next prime is 3703549. The reversal of 3703521 is 1253073.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3703521 - 2⁶ = 3703457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3703121) 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, 4095 + ... + 4916.

It is an arithmetic number, because the mean of its divisors is an integer number (621828).

Almost surely, 2^3703521 is an apocalyptic number.

It is an amenable number.

3703521 is a deficient number, since it is larger than the sum of its proper divisors (1271103).

3703521 is a wasteful number, since it uses less digits than its factorization.

3703521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 3703521 is about 1924.4534288987. The cubic root of 3703521 is about 154.7170836388.

Adding to 3703521 its reverse (1253073), we get a palindrome (4956594).

It can be divided in two parts, 3703 and 521, that added together give a palindrome (4224).

The spelling of 3703521 in words is "three million, seven hundred three thousand, five hundred twenty-one".