7820281 has 8 divisors (see below), whose sum is σ = 9145664. Its totient is φ = 6546960.

The previous prime is 7820269. The next prime is 7820287. The reversal of 7820281 is 1820287.

7820281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7820281 - 2⁵ = 7820249 is a prime.

It is a super-2 number, since 2×7820281² = 122313589837922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7820287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12690 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (1143208).

Almost surely, 2^7820281 is an apocalyptic number.

It is an amenable number.

7820281 is a deficient number, since it is larger than the sum of its proper divisors (1325383).

7820281 is a wasteful number, since it uses less digits than its factorization.

7820281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26031.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 7820281 is about 2796.4765330680. The cubic root of 7820281 is about 198.4909846654.

The spelling of 7820281 in words is "seven million, eight hundred twenty thousand, two hundred eighty-one".