3732721 has 4 divisors (see below), whose sum is σ = 3929200. Its totient is φ = 3536244.

The previous prime is 3732719. The next prime is 3732727. The reversal of 3732721 is 1272373.

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 3732721 - 2¹ = 3732719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3732727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98211 + ... + 98248.

It is an arithmetic number, because the mean of its divisors is an integer number (982300).

Almost surely, 2^3732721 is an apocalyptic number.

It is an amenable number.

3732721 is a deficient number, since it is larger than the sum of its proper divisors (196479).

3732721 is a wasteful number, since it uses less digits than its factorization.

3732721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196478.

The product of its digits is 1764, while the sum is 25.

The square root of 3732721 is about 1932.0251033566. The cubic root of 3732721 is about 155.1226362084.

The spelling of 3732721 in words is "three million, seven hundred thirty-two thousand, seven hundred twenty-one".