3720506 has 4 divisors (see below), whose sum is σ = 5580762. Its totient is φ = 1860252.

The previous prime is 3720491. The next prime is 3720511. The reversal of 3720506 is 6050273.

3720506 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 an emirpimes, since its reverse is a distinct semiprime: 6050273 = 59 ⋅102547.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 167281 = 1885^2 + 409^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 930125 + ... + 930128.

Almost surely, 2^3720506 is an apocalyptic number.

3720506 is a deficient number, since it is larger than the sum of its proper divisors (1860256).

3720506 is a wasteful number, since it uses less digits than its factorization.

3720506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860255.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 3720506 is about 1928.8613221276. The cubic root of 3720506 is about 154.9532429207.

Adding to 3720506 its reverse (6050273), we get a palindrome (9770779).

The spelling of 3720506 in words is "three million, seven hundred twenty thousand, five hundred six".