7122105 has 12 divisors (see below), whose sum is σ = 12345060. Its totient is φ = 3798432.

The previous prime is 7122103. The next prime is 7122107. The reversal of 7122105 is 5012217.

It is an interprime number because it is at equal distance from previous prime (7122103) and next prime (7122107).

It can be written as a sum of positive squares in 2 ways, for example, as 2812329 + 4309776 = 1677^2 + 2076^2 .

It is not a de Polignac number, because 7122105 - 2¹ = 7122103 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7122103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79090 + ... + 79179.

It is an arithmetic number, because the mean of its divisors is an integer number (1028755).

Almost surely, 2^7122105 is an apocalyptic number.

It is an amenable number.

7122105 is a deficient number, since it is larger than the sum of its proper divisors (5222955).

7122105 is a wasteful number, since it uses less digits than its factorization.

7122105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158280 (or 158277 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 7122105 is about 2668.7272247272. The cubic root of 7122105 is about 192.3989912537.

It can be divided in two parts, 7122 and 105, that added together give a palindrome (7227).

The spelling of 7122105 in words is "seven million, one hundred twenty-two thousand, one hundred five".