7205540 has 12 divisors (see below), whose sum is σ = 15131676. Its totient is φ = 2882208.

The previous prime is 7205537. The next prime is 7205551. The reversal of 7205540 is 455027.

It can be written as a sum of positive squares in 2 ways, for example, as 3076516 + 4129024 = 1754^2 + 2032^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180119 + ... + 180158.

It is an arithmetic number, because the mean of its divisors is an integer number (1260973).

Almost surely, 2^7205540 is an apocalyptic number.

It is an amenable number.

7205540 is an abundant number, since it is smaller than the sum of its proper divisors (7926136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7205540 is a wasteful number, since it uses less digits than its factorization.

7205540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360286 (or 360284 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 7205540 is about 2684.3136925479. The cubic root of 7205540 is about 193.1473902536.

The spelling of 7205540 in words is "seven million, two hundred five thousand, five hundred forty".