3435721 has 4 divisors (see below), whose sum is σ = 3439744. Its totient is φ = 3431700.

The previous prime is 3435701. The next prime is 3435727. The reversal of 3435721 is 1275343.

3435721 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1275343 = 331 ⋅3853.

It is a cyclic number.

It is not a de Polignac number, because 3435721 - 2⁵ = 3435689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3435727) 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, 165 + ... + 2626.

It is an arithmetic number, because the mean of its divisors is an integer number (859936).

Almost surely, 2^3435721 is an apocalyptic number.

It is an amenable number.

3435721 is a deficient number, since it is larger than the sum of its proper divisors (4023).

3435721 is a wasteful number, since it uses less digits than its factorization.

3435721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022.

The product of its digits is 2520, while the sum is 25.

The square root of 3435721 is about 1853.5697990634. The cubic root of 3435721 is about 150.8942288091.

The spelling of 3435721 in words is "three million, four hundred thirty-five thousand, seven hundred twenty-one".