3721345 has 8 divisors (see below), whose sum is σ = 4510440. Its totient is φ = 2947200.

The previous prime is 3721339. The next prime is 3721363. The reversal of 3721345 is 5431273.

It can be written as a sum of positive squares in 4 ways, for example, as 2163841 + 1557504 = 1471^2 + 1248^2 .

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

It is not a de Polignac number, because 3721345 - 2³ = 3721337 is a prime.

It is an Ulam 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, 3180 + ... + 4189.

It is an arithmetic number, because the mean of its divisors is an integer number (563805).

Almost surely, 2^3721345 is an apocalyptic number.

It is an amenable number.

3721345 is a deficient number, since it is larger than the sum of its proper divisors (789095).

3721345 is a wasteful number, since it uses less digits than its factorization.

3721345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475.

The product of its digits is 2520, while the sum is 25.

The square root of 3721345 is about 1929.0787956950. The cubic root of 3721345 is about 154.9648897235.

The spelling of 3721345 in words is "three million, seven hundred twenty-one thousand, three hundred forty-five".