7281250 has 28 divisors (see below), whose sum is σ = 13710762. Its totient is φ = 2900000.

The previous prime is 7281247. The next prime is 7281251. The reversal of 7281250 is 521827.

It can be written as a sum of positive squares in 7 ways, for example, as 5004169 + 2277081 = 2237^2 + 1509^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a nialpdrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (7281251) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 31134 + ... + 31366.

Almost surely, 2^7281250 is an apocalyptic number.

7281250 is a deficient number, since it is larger than the sum of its proper divisors (6429512).

7281250 is an frugal number, since it uses more digits than its factorization.

7281250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 7281250 is about 2698.3791431154. The cubic root of 7281250 is about 193.8215136633.

The spelling of 7281250 in words is "seven million, two hundred eighty-one thousand, two hundred fifty".