4125221 has 8 divisors (see below), whose sum is σ = 4341600. Its totient is φ = 3913840.

The previous prime is 4125181. The next prime is 4125229. The reversal of 4125221 is 1225214.

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

It is not a de Polignac number, because 4125221 - 2¹⁴ = 4108837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4125221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4125229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506 + ... + 2916.

It is an arithmetic number, because the mean of its divisors is an integer number (542700).

Almost surely, 2^4125221 is an apocalyptic number.

It is an amenable number.

4125221 is a deficient number, since it is larger than the sum of its proper divisors (216379).

4125221 is a wasteful number, since it uses less digits than its factorization.

4125221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499.

The product of its digits is 160, while the sum is 17.

The square root of 4125221 is about 2031.0640068693. The cubic root of 4125221 is about 160.3795805500.

The spelling of 4125221 in words is "four million, one hundred twenty-five thousand, two hundred twenty-one".