3694721 has 8 divisors (see below), whose sum is σ = 3916320. Its totient is φ = 3475872.

The previous prime is 3694711. The next prime is 3694723. The reversal of 3694721 is 1274963.

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 3694721 - 2¹⁸ = 3432577 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3694723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (489540).

Almost surely, 2^3694721 is an apocalyptic number.

It is an amenable number.

3694721 is a deficient number, since it is larger than the sum of its proper divisors (221599).

3694721 is a wasteful number, since it uses less digits than its factorization.

3694721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its digits is 9072, while the sum is 32.

The square root of 3694721 is about 1922.1657056560. The cubic root of 3694721 is about 154.5944444772.

The spelling of 3694721 in words is "three million, six hundred ninety-four thousand, seven hundred twenty-one".