7205545 has 8 divisors (see below), whose sum is σ = 8857800. Its totient is φ = 5623680.

The previous prime is 7205537. The next prime is 7205551. The reversal of 7205545 is 5455027.

It can be written as a sum of positive squares in 4 ways, for example, as 257049 + 6948496 = 507^2 + 2636^2 .

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

It is not a de Polignac number, because 7205545 - 2³ = 7205537 is a prime.

It is a super-3 number, since 3×7205545³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17370 + ... + 17779.

It is an arithmetic number, because the mean of its divisors is an integer number (1107225).

Almost surely, 2^7205545 is an apocalyptic number.

It is an amenable number.

7205545 is a deficient number, since it is larger than the sum of its proper divisors (1652255).

7205545 is a wasteful number, since it uses less digits than its factorization.

7205545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35195.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 7205545 is about 2684.3146238845. The cubic root of 7205545 is about 193.1474349292.

It can be divided in two parts, 7205 and 545, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 7205545 in words is "seven million, two hundred five thousand, five hundred forty-five".