7224149 has 2 divisors, whose sum is σ = 7224150. Its totient is φ = 7224148.

The previous prime is 7224143. The next prime is 7224181. The reversal of 7224149 is 9414227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4231249 + 2992900 = 2057^2 + 1730^2 .

It is an emirp because it is prime and its reverse (9414227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7224149 - 2⁸ = 7223893 is a prime.

It is a Chen prime.

It is equal to p₄₉₀₈₅₃ and since 7224149 and 490853 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7224143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612074 + 3612075.

It is an arithmetic number, because the mean of its divisors is an integer number (3612075).

Almost surely, 2^7224149 is an apocalyptic number.

It is an amenable number.

7224149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224149 is an equidigital number, since it uses as much as digits as its factorization.

7224149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 7224149 is about 2687.7777065821. Note that the first 4 decimals coincide. The cubic root of 7224149 is about 193.3135212225.

The spelling of 7224149 in words is "seven million, two hundred twenty-four thousand, one hundred forty-nine".