7240447 has 2 divisors, whose sum is σ = 7240448. Its totient is φ = 7240446.

The previous prime is 7240439. The next prime is 7240481. The reversal of 7240447 is 7440427.

It is a weak prime.

It is an emirp because it is prime and its reverse (7440427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7240447 - 2³ = 7240439 is a prime.

It is a Chen prime.

7240447 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7240847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620223 + 3620224.

It is an arithmetic number, because the mean of its divisors is an integer number (3620224).

Almost surely, 2^7240447 is an apocalyptic number.

7240447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7240447 is an equidigital number, since it uses as much as digits as its factorization.

7240447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 7240447 is about 2690.8078712535. The cubic root of 7240447 is about 193.4587866565.

The spelling of 7240447 in words is "seven million, two hundred forty thousand, four hundred forty-seven".