3125221 has 4 divisors (see below), whose sum is σ = 3409344. Its totient is φ = 2841100.

The previous prime is 3125219. The next prime is 3125257. The reversal of 3125221 is 1225213.

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.

It is a cyclic number.

It is not a de Polignac number, because 3125221 - 2¹ = 3125219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3125195 and 3125204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142045 + ... + 142066.

It is an arithmetic number, because the mean of its divisors is an integer number (852336).

Almost surely, 2^3125221 is an apocalyptic number.

It is an amenable number.

3125221 is a deficient number, since it is larger than the sum of its proper divisors (284123).

3125221 is a wasteful number, since it uses less digits than its factorization.

3125221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284122.

The product of its digits is 120, while the sum is 16.

The square root of 3125221 is about 1767.8294601007. The cubic root of 3125221 is about 146.2043332716.

It can be divided in two parts, 31 and 25221, that added together give a palindrome (25252).

The spelling of 3125221 in words is "three million, one hundred twenty-five thousand, two hundred twenty-one".