7121226 has 16 divisors (see below), whose sum is σ = 16277184. Its totient is φ = 2034624.

The previous prime is 7121209. The next prime is 7121263. The reversal of 7121226 is 6221217.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 84735 + ... + 84818.

It is an arithmetic number, because the mean of its divisors is an integer number (1017324).

Almost surely, 2^7121226 is an apocalyptic number.

7121226 is an abundant number, since it is smaller than the sum of its proper divisors (9155958).

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

7121226 is a wasteful number, since it uses less digits than its factorization.

7121226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169565.

The product of its digits is 336, while the sum is 21.

The square root of 7121226 is about 2668.5625343994. The cubic root of 7121226 is about 192.3910757254.

Subtracting from 7121226 its reverse (6221217), we obtain a palindrome (900009).

The spelling of 7121226 in words is "seven million, one hundred twenty-one thousand, two hundred twenty-six".