7280625 has 40 divisors (see below), whose sum is σ = 13270752. Its totient is φ = 3520000.

The previous prime is 7280621. The next prime is 7280633. The reversal of 7280625 is 5260827.

It is not a de Polignac number, because 7280625 - 2² = 7280621 is a prime.

It is a Curzon number.

7280625 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7280592 and 7280601.

It is not an unprimeable number, because it can be changed into a prime (7280621) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20449 + ... + 20801.

Almost surely, 2^7280625 is an apocalyptic number.

7280625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7280625 is a deficient number, since it is larger than the sum of its proper divisors (5990127).

7280625 is a wasteful number, since it uses less digits than its factorization.

7280625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 7280625 is about 2698.2633303664. The cubic root of 7280625 is about 193.8159678247.

The spelling of 7280625 in words is "seven million, two hundred eighty thousand, six hundred twenty-five".