3721517 has 4 divisors (see below), whose sum is σ = 3728256. Its totient is φ = 3714780.

The previous prime is 3721489. The next prime is 3721537. The reversal of 3721517 is 7151273.

3721517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3721517 - 2¹⁸ = 3459373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2459 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (932064).

Almost surely, 2^3721517 is an apocalyptic number.

It is an amenable number.

3721517 is a deficient number, since it is larger than the sum of its proper divisors (6739).

3721517 is an equidigital number, since it uses as much as digits as its factorization.

3721517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738.

The product of its digits is 1470, while the sum is 26.

The square root of 3721517 is about 1929.1233760442. The cubic root of 3721517 is about 154.9672771713.

The spelling of 3721517 in words is "three million, seven hundred twenty-one thousand, five hundred seventeen".