7375221 has 24 divisors (see below), whose sum is σ = 12265344. Its totient is φ = 4183200.

The previous prime is 7375217. The next prime is 7375223. The reversal of 7375221 is 1225737.

7375221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7375221 - 2² = 7375217 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7³ + 3¹³ + 7⁸ + 5⁶ + 2⁶ + 2⁶ + 1 .

7375221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7375223) 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 23 ways as a sum of consecutive naturals, for example, 10171 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (511056).

Almost surely, 2^7375221 is an apocalyptic number.

It is an amenable number.

7375221 is a deficient number, since it is larger than the sum of its proper divisors (4890123).

7375221 is a wasteful number, since it uses less digits than its factorization.

7375221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 878 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 7375221 is about 2715.7358118933. The cubic root of 7375221 is about 194.6517650730.

The spelling of 7375221 in words is "seven million, three hundred seventy-five thousand, two hundred twenty-one".