3704721 has 16 divisors (see below), whose sum is σ = 5174400. Its totient is φ = 2354688.

The previous prime is 3704707. The next prime is 3704731. The reversal of 3704721 is 1274073.

It is not a de Polignac number, because 3704721 - 2⁵ = 3704689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3704691 and 3704700.

It is not an unprimeable number, because it can be changed into a prime (3704731) 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, 8220 + ... + 8658.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

Almost surely, 2^3704721 is an apocalyptic number.

It is an amenable number.

3704721 is a deficient number, since it is larger than the sum of its proper divisors (1469679).

3704721 is a wasteful number, since it uses less digits than its factorization.

3704721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 3704721 is about 1924.7651804831. The cubic root of 3704721 is about 154.7337921037.

Adding to 3704721 its reverse (1274073), we get a palindrome (4978794).

The spelling of 3704721 in words is "three million, seven hundred four thousand, seven hundred twenty-one".