7271121 has 32 divisors (see below), whose sum is σ = 12071808. Its totient is φ = 3824640.

The previous prime is 7271113. The next prime is 7271137. The reversal of 7271121 is 1211727.

It is a happy number.

It is not a de Polignac number, because 7271121 - 2³ = 7271113 is a prime.

It is an Ulam number.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 6795 + ... + 7791.

It is an arithmetic number, because the mean of its divisors is an integer number (377244).

Almost surely, 2^7271121 is an apocalyptic number.

It is an amenable number.

7271121 is a deficient number, since it is larger than the sum of its proper divisors (4800687).

7271121 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (7271120) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1041).

7271121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its digits is 196, while the sum is 21.

The square root of 7271121 is about 2696.5016224731. The cubic root of 7271121 is about 193.7315964483.

Adding to 7271121 its reverse (1211727), we get a palindrome (8482848).

The spelling of 7271121 in words is "seven million, two hundred seventy-one thousand, one hundred twenty-one".