3721761 has 16 divisors (see below), whose sum is σ = 5544000. Its totient is φ = 2467584.

The previous prime is 3721741. The next prime is 3721771. The reversal of 3721761 is 1671273.

It is not a de Polignac number, because 3721761 - 2¹¹ = 3719713 is a prime.

It is a super-2 number, since 2×3721761² = 27703009882242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3721721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8065 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (346500).

Almost surely, 2^3721761 is an apocalyptic number.

It is an amenable number.

3721761 is a deficient number, since it is larger than the sum of its proper divisors (1822239).

3721761 is a wasteful number, since it uses less digits than its factorization.

3721761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 759 counting only the distinct ones).

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

The square root of 3721761 is about 1929.1866161675. The cubic root of 3721761 is about 154.9706638896.

The spelling of 3721761 in words is "three million, seven hundred twenty-one thousand, seven hundred sixty-one".