7119221 has 4 divisors (see below), whose sum is σ = 7124652. Its totient is φ = 7113792.

The previous prime is 7119193. The next prime is 7119227. The reversal of 7119221 is 1229117.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 286225 = 2614^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7119221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7119227) 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, 605 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (1781163).

Almost surely, 2^7119221 is an apocalyptic number.

It is an amenable number.

7119221 is a deficient number, since it is larger than the sum of its proper divisors (5431).

7119221 is a wasteful number, since it uses less digits than its factorization.

7119221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430.

The product of its digits is 252, while the sum is 23.

The square root of 7119221 is about 2668.1868375359. The cubic root of 7119221 is about 192.3730179586.

The spelling of 7119221 in words is "seven million, one hundred nineteen thousand, two hundred twenty-one".