7200405 has 12 divisors (see below), whose sum is σ = 12480780. Its totient is φ = 3840192.

The previous prime is 7200397. The next prime is 7200409. The reversal of 7200405 is 5040027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5716881 + 1483524 = 2391^2 + 1218^2 .

It is not a de Polignac number, because 7200405 - 2³ = 7200397 is a prime.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79960 + ... + 80049.

It is an arithmetic number, because the mean of its divisors is an integer number (1040065).

Almost surely, 2^7200405 is an apocalyptic number.

It is an amenable number.

7200405 is a deficient number, since it is larger than the sum of its proper divisors (5280375).

7200405 is a wasteful number, since it uses less digits than its factorization.

7200405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160020 (or 160017 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 7200405 is about 2683.3570392328. The cubic root of 7200405 is about 193.1014974384.

The spelling of 7200405 in words is "seven million, two hundred thousand, four hundred five".