3925221 has 8 divisors (see below), whose sum is σ = 5271840. Its totient is φ = 2597712.

The previous prime is 3925213. The next prime is 3925223. The reversal of 3925221 is 1225293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3925221 - 2³ = 3925213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3925191 and 3925200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (658980).

Almost surely, 2^3925221 is an apocalyptic number.

It is an amenable number.

3925221 is a deficient number, since it is larger than the sum of its proper divisors (1346619).

3925221 is a wasteful number, since it uses less digits than its factorization.

3925221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9555.

The product of its digits is 1080, while the sum is 24.

The square root of 3925221 is about 1981.2170501992. The cubic root of 3925221 is about 157.7446738758.

The spelling of 3925221 in words is "three million, nine hundred twenty-five thousand, two hundred twenty-one".