7271161 has 4 divisors (see below), whose sum is σ = 7299072. Its totient is φ = 7243252.

The previous prime is 7271137. The next prime is 7271177. The reversal of 7271161 is 1611727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1611727 = 13 ⋅123979.

It is a cyclic number.

It is not a de Polignac number, because 7271161 - 2⁹ = 7270649 is a prime.

It is a Duffinian number.

7271161 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7271111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13561 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (1824768).

Almost surely, 2^7271161 is an apocalyptic number.

It is an amenable number.

7271161 is a deficient number, since it is larger than the sum of its proper divisors (27911).

7271161 is a wasteful number, since it uses less digits than its factorization.

7271161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27910.

The product of its digits is 588, while the sum is 25.

The square root of 7271161 is about 2696.5090394805. The cubic root of 7271161 is about 193.7319517007.

Adding to 7271161 its reverse (1611727), we get a palindrome (8882888).

The spelling of 7271161 in words is "seven million, two hundred seventy-one thousand, one hundred sixty-one".