3721385 has 8 divisors (see below), whose sum is σ = 4728456. Its totient is φ = 2801920.

The previous prime is 3721379. The next prime is 3721391. The reversal of 3721385 is 5831273.

It is an interprime number because it is at equal distance from previous prime (3721379) and next prime (3721391).

It can be written as a sum of positive squares in 4 ways, for example, as 1968409 + 1752976 = 1403^2 + 1324^2 .

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

It is not a de Polignac number, because 3721385 - 2⁸ = 3721129 is a prime.

It is a Duffinian 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, 21806 + ... + 21975.

It is an arithmetic number, because the mean of its divisors is an integer number (591057).

Almost surely, 2^3721385 is an apocalyptic number.

It is an amenable number.

3721385 is a deficient number, since it is larger than the sum of its proper divisors (1007071).

3721385 is a wasteful number, since it uses less digits than its factorization.

3721385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43803.

The product of its digits is 5040, while the sum is 29.

The square root of 3721385 is about 1929.0891633100. The cubic root of 3721385 is about 154.9654449505.

The spelling of 3721385 in words is "three million, seven hundred twenty-one thousand, three hundred eighty-five".