71244450 has 144 divisors (see below), whose sum is σ = 207174240. Its totient is φ = 17487360.

The previous prime is 71244449. The next prime is 71244451. The reversal of 71244450 is 5444217.

It is an interprime number because it is at equal distance from previous prime (71244449) and next prime (71244451).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71244451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 512481 + ... + 512619.

It is an arithmetic number, because the mean of its divisors is an integer number (1438710).

Almost surely, 2^71244450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71244450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103587120).

71244450 is an abundant number, since it is smaller than the sum of its proper divisors (135929790).

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

71244450 is a wasteful number, since it uses less digits than its factorization.

71244450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 71244450 is about 8440.6427480376. The cubic root of 71244450 is about 414.5564526116.

Adding to 71244450 its reverse (5444217), we get a palindrome (76688667).

The spelling of 71244450 in words is "seventy-one million, two hundred forty-four thousand, four hundred fifty".