7215449 has 2 divisors, whose sum is σ = 7215450. Its totient is φ = 7215448.

The previous prime is 7215437. The next prime is 7215451. The reversal of 7215449 is 9445127.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3829849 + 3385600 = 1957^2 + 1840^2 .

It is an emirp because it is prime and its reverse (9445127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7215449 - 2⁴ = 7215433 is a prime.

Together with 7215451, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7215419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607724 + 3607725.

It is an arithmetic number, because the mean of its divisors is an integer number (3607725).

Almost surely, 2^7215449 is an apocalyptic number.

It is an amenable number.

7215449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215449 is an equidigital number, since it uses as much as digits as its factorization.

7215449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 7215449 is about 2686.1587816062. The cubic root of 7215449 is about 193.2358879389.

The spelling of 7215449 in words is "seven million, two hundred fifteen thousand, four hundred forty-nine".