7271145 has 48 divisors (see below), whose sum is σ = 14781312. Its totient is φ = 3237120.

The previous prime is 7271137. The next prime is 7271177. The reversal of 7271145 is 5411727.

It is not a de Polignac number, because 7271145 - 2³ = 7271137 is a prime.

It is a super-2 number, since 2×7271145² = 105739099222050, which contains 22 as substring.

It is an Ulam number.

7271145 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12634 + ... + 13196.

It is an arithmetic number, because the mean of its divisors is an integer number (307944).

Almost surely, 2^7271145 is an apocalyptic number.

It is an amenable number.

7271145 is an abundant number, since it is smaller than the sum of its proper divisors (7510167).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7271145 is a wasteful number, since it uses less digits than its factorization.

7271145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 619 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 7271145 is about 2696.5060726800. The cubic root of 7271145 is about 193.7318095999.

It can be divided in two parts, 72 and 71145, that added together give a palindrome (71217).

The spelling of 7271145 in words is "seven million, two hundred seventy-one thousand, one hundred forty-five".