71121272 has 32 divisors (see below), whose sum is σ = 136094880. Its totient is φ = 34836480.

The previous prime is 71121247. The next prime is 71121277. The reversal of 71121272 is 27212117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71121277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112397 + ... + 113027.

It is an arithmetic number, because the mean of its divisors is an integer number (4252965).

Almost surely, 2^71121272 is an apocalyptic number.

It is an amenable number.

71121272 is a deficient number, since it is larger than the sum of its proper divisors (64973608).

71121272 is a wasteful number, since it uses less digits than its factorization.

71121272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 899 counting only the distinct ones).

The product of its digits is 392, while the sum is 23.

The square root of 71121272 is about 8433.3428721949. The cubic root of 71121272 is about 414.3173991734.

Adding to 71121272 its reverse (27212117), we get a palindrome (98333389).

The spelling of 71121272 in words is "seventy-one million, one hundred twenty-one thousand, two hundred seventy-two".