7229905 has 4 divisors (see below), whose sum is σ = 8675892. Its totient is φ = 5783920.

The previous prime is 7229897. The next prime is 7229909. The reversal of 7229905 is 5099227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5089536 + 2140369 = 2256^2 + 1463^2 .

It is not a de Polignac number, because 7229905 - 2³ = 7229897 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7229909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722986 + ... + 722995.

It is an arithmetic number, because the mean of its divisors is an integer number (2168973).

Almost surely, 2^7229905 is an apocalyptic number.

It is an amenable number.

7229905 is a deficient number, since it is larger than the sum of its proper divisors (1445987).

7229905 is a wasteful number, since it uses less digits than its factorization.

7229905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445986.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 7229905 is about 2688.8482664516. The cubic root of 7229905 is about 193.3648498627.

The spelling of 7229905 in words is "seven million, two hundred twenty-nine thousand, nine hundred five".