7206905 has 4 divisors (see below), whose sum is σ = 8648292. Its totient is φ = 5765520.

The previous prime is 7206847. The next prime is 7206907. The reversal of 7206905 is 5096027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5096027 = 1597 ⋅3191.

It can be written as a sum of positive squares in 2 ways, for example, as 4932841 + 2274064 = 2221^2 + 1508^2 .

It is not a de Polignac number, because 7206905 - 2⁶ = 7206841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7206907) 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, 720686 + ... + 720695.

It is an arithmetic number, because the mean of its divisors is an integer number (2162073).

Almost surely, 2^7206905 is an apocalyptic number.

It is an amenable number.

7206905 is a deficient number, since it is larger than the sum of its proper divisors (1441387).

7206905 is a wasteful number, since it uses less digits than its factorization.

7206905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441386.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 7206905 is about 2684.5679354414. The cubic root of 7206905 is about 193.1595859410.

The spelling of 7206905 in words is "seven million, two hundred six thousand, nine hundred five".