7122149 has 2 divisors, whose sum is σ = 7122150. Its totient is φ = 7122148.

The previous prime is 7122121. The next prime is 7122179. The reversal of 7122149 is 9412217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7059649 + 62500 = 2657^2 + 250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7122149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7122109) 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 as a sum of consecutive naturals, namely, 3561074 + 3561075.

It is an arithmetic number, because the mean of its divisors is an integer number (3561075).

Almost surely, 2^7122149 is an apocalyptic number.

It is an amenable number.

7122149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7122149 is an equidigital number, since it uses as much as digits as its factorization.

7122149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 7122149 is about 2668.7354683445. The cubic root of 7122149 is about 192.3993874632.

The spelling of 7122149 in words is "seven million, one hundred twenty-two thousand, one hundred forty-nine".