7271881 has 2 divisors, whose sum is σ = 7271882. Its totient is φ = 7271880.

The previous prime is 7271867. The next prime is 7271897. The reversal of 7271881 is 1881727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 1121481 = 2480^2 + 1059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7271881 is a prime.

It is a super-2 number, since 2×7271881² = 105760506556322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7271821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3635940 + 3635941.

It is an arithmetic number, because the mean of its divisors is an integer number (3635941).

Almost surely, 2^7271881 is an apocalyptic number.

It is an amenable number.

7271881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7271881 is an equidigital number, since it uses as much as digits as its factorization.

7271881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 34.

The square root of 7271881 is about 2696.6425421253. The cubic root of 7271881 is about 193.7383460212.

The spelling of 7271881 in words is "seven million, two hundred seventy-one thousand, eight hundred eighty-one".