3720005 has 8 divisors (see below), whose sum is σ = 4480152. Its totient is φ = 2965248.

The previous prime is 3719999. The next prime is 3720011. The reversal of 3720005 is 5000273.

It is an interprime number because it is at equal distance from previous prime (3719999) and next prime (3720011).

It can be written as a sum of positive squares in 4 ways, for example, as 25921 + 3694084 = 161^2 + 1922^2 .

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 3720005 - 2¹² = 3715909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377 + ... + 2753.

It is an arithmetic number, because the mean of its divisors is an integer number (560019).

Almost surely, 2^3720005 is an apocalyptic number.

It is an amenable number.

3720005 is a deficient number, since it is larger than the sum of its proper divisors (760147).

3720005 is a wasteful number, since it uses less digits than its factorization.

3720005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695.

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 3720005 is about 1928.7314483878. The cubic root of 3720005 is about 154.9462873202.

Adding to 3720005 its reverse (5000273), we get a palindrome (8720278).

The spelling of 3720005 in words is "three million, seven hundred twenty thousand, five".