71245224 has 64 divisors (see below), whose sum is σ = 198600000. Its totient is φ = 23664960.

The previous prime is 71245219. The next prime is 71245243. The reversal of 71245224 is 42254217.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 107454 + ... + 108114.

It is an arithmetic number, because the mean of its divisors is an integer number (3103125).

Almost surely, 2^71245224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71245224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99300000).

71245224 is an abundant number, since it is smaller than the sum of its proper divisors (127354776).

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

71245224 is a wasteful number, since it uses less digits than its factorization.

71245224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1165 counting only the distinct ones).

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

The square root of 71245224 is about 8440.6885975020. The cubic root of 71245224 is about 414.5579538538.

The spelling of 71245224 in words is "seventy-one million, two hundred forty-five thousand, two hundred twenty-four".