3425721 has 16 divisors (see below), whose sum is σ = 5209344. Its totient is φ = 1983744.

The previous prime is 3425693. The next prime is 3425729. The reversal of 3425721 is 1275243.

3425721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3425721 - 2¹⁴ = 3409337 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3425691 and 3425700.

It is not an unprimeable number, because it can be changed into a prime (3425729) 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 15 ways as a sum of consecutive naturals, for example, 1921 + ... + 3246.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

Almost surely, 2^3425721 is an apocalyptic number.

It is an amenable number.

3425721 is a deficient number, since it is larger than the sum of its proper divisors (1783623).

3425721 is a wasteful number, since it uses less digits than its factorization.

3425721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200.

The product of its digits is 1680, while the sum is 24.

The square root of 3425721 is about 1850.8703358150. The cubic root of 3425721 is about 150.7476891032.

The spelling of 3425721 in words is "three million, four hundred twenty-five thousand, seven hundred twenty-one".