3470721 has 4 divisors (see below), whose sum is σ = 4627632. Its totient is φ = 2313812.

The previous prime is 3470713. The next prime is 3470741. The reversal of 3470721 is 1270743.

3470721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1270743 = 3 ⋅423581.

It is a cyclic number.

It is not a de Polignac number, because 3470721 - 2³ = 3470713 is a prime.

It is a D-number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3470691 and 3470700.

It is not an unprimeable number, because it can be changed into a prime (3470741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578451 + ... + 578456.

It is an arithmetic number, because the mean of its divisors is an integer number (1156908).

Almost surely, 2^3470721 is an apocalyptic number.

It is an amenable number.

3470721 is a deficient number, since it is larger than the sum of its proper divisors (1156911).

3470721 is a wasteful number, since it uses less digits than its factorization.

3470721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156910.

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

The square root of 3470721 is about 1862.9871175078. The cubic root of 3470721 is about 151.4048897090.

The spelling of 3470721 in words is "three million, four hundred seventy thousand, seven hundred twenty-one".