71409112 has 64 divisors (see below), whose sum is σ = 152176320. Its totient is φ = 31223808.

The previous prime is 71409103. The next prime is 71409113. The reversal of 71409112 is 21190417.

It is a super-2 number, since 2×71409112² = 10198522553257088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71409113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115428 + ... + 116044.

It is an arithmetic number, because the mean of its divisors is an integer number (2377755).

Almost surely, 2^71409112 is an apocalyptic number.

It is an amenable number.

71409112 is an abundant number, since it is smaller than the sum of its proper divisors (80767208).

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

71409112 is a wasteful number, since it uses less digits than its factorization.

71409112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 71409112 is about 8450.3912335465. The cubic root of 71409112 is about 414.8755847106.

Adding to 71409112 its reverse (21190417), we get a palindrome (92599529).

The spelling of 71409112 in words is "seventy-one million, four hundred nine thousand, one hundred twelve".