7121322 has 36 divisors (see below), whose sum is σ = 16714854. Its totient is φ = 2190240.

The previous prime is 7121321. The next prime is 7121339. The reversal of 7121322 is 2231217.

It can be written as a sum of positive squares in 3 ways, for example, as 4124961 + 2996361 = 2031^2 + 1731^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 7121295 and 7121304.

It is not an unprimeable number, because it can be changed into a prime (7121321) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1872 + ... + 4212.

Almost surely, 2^7121322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7121322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8357427).

7121322 is an abundant number, since it is smaller than the sum of its proper divisors (9593532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121322 is a wasteful number, since it uses less digits than its factorization.

7121322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375 (or 2359 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 7121322 is about 2668.5805215507. The cubic root of 7121322 is about 192.3919402516.

Adding to 7121322 its reverse (2231217), we get a palindrome (9352539).

The spelling of 7121322 in words is "seven million, one hundred twenty-one thousand, three hundred twenty-two".