7251229 has 4 divisors (see below), whose sum is σ = 7273084. Its totient is φ = 7229376.

The previous prime is 7251227. The next prime is 7251239. The reversal of 7251229 is 9221527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9221527 = 7 ⋅1317361.

It can be written as a sum of positive squares in 2 ways, for example, as 2256004 + 4995225 = 1502^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251229 - 2¹ = 7251227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7251197 and 7251206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7251221) 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 3 ways as a sum of consecutive naturals, for example, 10422 + ... + 11095.

It is an arithmetic number, because the mean of its divisors is an integer number (1818271).

Almost surely, 2^7251229 is an apocalyptic number.

It is an amenable number.

7251229 is a deficient number, since it is larger than the sum of its proper divisors (21855).

7251229 is a wasteful number, since it uses less digits than its factorization.

7251229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854.

The product of its digits is 2520, while the sum is 28.

The square root of 7251229 is about 2692.8106134669. The cubic root of 7251229 is about 193.5547677523.

The spelling of 7251229 in words is "seven million, two hundred fifty-one thousand, two hundred twenty-nine".