71214540 has 48 divisors (see below), whose sum is σ = 204271200. Its totient is φ = 18526720.

The previous prime is 71214487. The next prime is 71214551. The reversal of 71214540 is 4541217.

It is a self number, because there is not a number n which added to its sum of digits gives 71214540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12015 + ... + 16934.

It is an arithmetic number, because the mean of its divisors is an integer number (4255650).

Almost surely, 2^71214540 is an apocalyptic number.

It is an amenable number.

71214540 is an abundant number, since it is smaller than the sum of its proper divisors (133056660).

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

71214540 is a wasteful number, since it uses less digits than its factorization.

71214540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29002 (or 29000 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 71214540 is about 8438.8707775389. The cubic root of 71214540 is about 414.4984311606.

Adding to 71214540 its reverse (4541217), we get a palindrome (75755757).

The spelling of 71214540 in words is "seventy-one million, two hundred fourteen thousand, five hundred forty".