7280621 has 2 divisors, whose sum is σ = 7280622. Its totient is φ = 7280620.

The previous prime is 7280617. The next prime is 7280633. The reversal of 7280621 is 1260827.

7280621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 44521 = 2690^2 + 211^2 .

It is an emirp because it is prime and its reverse (1260827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7280621 - 2² = 7280617 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7280671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640310 + 3640311.

It is an arithmetic number, because the mean of its divisors is an integer number (3640311).

Almost surely, 2^7280621 is an apocalyptic number.

It is an amenable number.

7280621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280621 is an equidigital number, since it uses as much as digits as its factorization.

7280621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 7280621 is about 2698.2625891488. The cubic root of 7280621 is about 193.8159323303.

It can be divided in two parts, 72806 and 21, that added together give a palindrome (72827).

The spelling of 7280621 in words is "seven million, two hundred eighty thousand, six hundred twenty-one".