3721601 has 8 divisors (see below), whose sum is σ = 4093824. Its totient is φ = 3361680.

The previous prime is 3721583. The next prime is 3721603. The reversal of 3721601 is 1061273.

It is a happy number.

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 3721601 - 2⁶ = 3721537 is a prime.

It is a super-3 number, since 3×3721601³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3721603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (511728).

Almost surely, 2^3721601 is an apocalyptic number.

It is an amenable number.

3721601 is a deficient number, since it is larger than the sum of its proper divisors (372223).

3721601 is a wasteful number, since it uses less digits than its factorization.

3721601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 3721601 is about 1929.1451474682. The cubic root of 3721601 is about 154.9684431074.

Adding to 3721601 its reverse (1061273), we get a palindrome (4782874).

The spelling of 3721601 in words is "three million, seven hundred twenty-one thousand, six hundred one".