7205649 has 16 divisors (see below), whose sum is σ = 10640640. Its totient is φ = 4300560.

The previous prime is 7205641. The next prime is 7205657. The reversal of 7205649 is 9465027.

7205649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7205641) and next prime (7205657).

It is not a de Polignac number, because 7205649 - 2³ = 7205641 is a prime.

It is a super-2 number, since 2×7205649² = 103842755022402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

7205649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7205641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 582 + ... + 3840.

It is an arithmetic number, because the mean of its divisors is an integer number (665040).

Almost surely, 2^7205649 is an apocalyptic number.

It is an amenable number.

7205649 is a deficient number, since it is larger than the sum of its proper divisors (3434991).

7205649 is a wasteful number, since it uses less digits than its factorization.

7205649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 7205649 is about 2684.3339956123. Note that the first 3 decimals coincide. The cubic root of 7205649 is about 193.1483641783.

The spelling of 7205649 in words is "seven million, two hundred five thousand, six hundred forty-nine".