3721617 has 12 divisors (see below), whose sum is σ = 5399940. Its totient is φ = 2469888.

The previous prime is 3721603. The next prime is 3721621. The reversal of 3721617 is 7161273.

It can be written as a sum of positive squares in 2 ways, for example, as 3651921 + 69696 = 1911^2 + 264^2 .

It is not a de Polignac number, because 3721617 - 2⁷ = 3721489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3721117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1509 + ... + 3117.

It is an arithmetic number, because the mean of its divisors is an integer number (449995).

Almost surely, 2^3721617 is an apocalyptic number.

It is an amenable number.

3721617 is a deficient number, since it is larger than the sum of its proper divisors (1678323).

3721617 is a wasteful number, since it uses less digits than its factorization.

3721617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872 (or 1869 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 3721617 is about 1929.1492943782. The cubic root of 3721617 is about 154.9686651885.

The spelling of 3721617 in words is "three million, seven hundred twenty-one thousand, six hundred seventeen".