7072281 has 6 divisors (see below), whose sum is σ = 10215530. Its totient is φ = 4714848.

The previous prime is 7072277. The next prime is 7072321. The reversal of 7072281 is 1822707.

It can be written as a sum of positive squares in only one way, i.e., 4447881 + 2624400 = 2109^2 + 1620^2 .

It is not a de Polignac number, because 7072281 - 2² = 7072277 is a prime.

It is a super-2 number, since 2×7072281² = 100034317085922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7072981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392896 + ... + 392913.

Almost surely, 2^7072281 is an apocalyptic number.

It is an amenable number.

7072281 is a deficient number, since it is larger than the sum of its proper divisors (3143249).

7072281 is a wasteful number, since it uses less digits than its factorization.

7072281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785815 (or 785812 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 7072281 is about 2659.3760546414. The cubic root of 7072281 is about 191.9492867364.

Adding to 7072281 its reverse (1822707), we get a palindrome (8894988).

The spelling of 7072281 in words is "seven million, seventy-two thousand, two hundred eighty-one".