7281020 has 24 divisors (see below), whose sum is σ = 15502704. Its totient is φ = 2871936.

The previous prime is 7281011. The next prime is 7281031. The reversal of 7281020 is 201827.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 7280983 and 7281001.

It is a congruent number.

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, 1034 + ... + 3953.

It is an arithmetic number, because the mean of its divisors is an integer number (645946).

Almost surely, 2^7281020 is an apocalyptic number.

It is an amenable number.

7281020 is an abundant number, since it is smaller than the sum of its proper divisors (8221684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7281020 is a wasteful number, since it uses less digits than its factorization.

7281020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069 (or 5067 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 7281020 is about 2698.3365246018. The cubic root of 7281020 is about 193.8194728316.

Adding to 7281020 its reverse (201827), we get a palindrome (7482847).

The spelling of 7281020 in words is "seven million, two hundred eighty-one thousand, twenty".