7278825 has 48 divisors (see below), whose sum is σ = 12854336. Its totient is φ = 3628800.

The previous prime is 7278811. The next prime is 7278827. The reversal of 7278825 is 5288727.

7278825 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7278825 - 2⁵ = 7278793 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7278827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119295 + ... + 119355.

Almost surely, 2^7278825 is an apocalyptic number.

7278825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7278825 is a deficient number, since it is larger than the sum of its proper divisors (5575511).

7278825 is a wasteful number, since it uses less digits than its factorization.

7278825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 149 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 7278825 is about 2697.9297618730. The cubic root of 7278825 is about 193.7999940360.

The spelling of 7278825 in words is "seven million, two hundred seventy-eight thousand, eight hundred twenty-five".