7247705 has 8 divisors (see below), whose sum is σ = 8730312. Its totient is φ = 5776128.

The previous prime is 7247701. The next prime is 7247717. The reversal of 7247705 is 5077427.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1308736 + 5938969 = 1144^2 + 2437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7247705 - 2² = 7247701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7247701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (1091289).

Almost surely, 2^7247705 is an apocalyptic number.

It is an amenable number.

7247705 is a deficient number, since it is larger than the sum of its proper divisors (1482607).

7247705 is a wasteful number, since it uses less digits than its factorization.

7247705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 7247705 is about 2692.1561990345. The cubic root of 7247705 is about 193.5234076649.

The spelling of 7247705 in words is "seven million, two hundred forty-seven thousand, seven hundred five".