71253504 has 180 divisors, whose sum is σ = 240126744. Its totient is φ = 19924992.

The previous prime is 71253503. The next prime is 71253557. The reversal of 71253504 is 40535217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71253503) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1516009 + ... + 1516055.

Almost surely, 2^71253504 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 71253504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120063372).

71253504 is an abundant number, since it is smaller than the sum of its proper divisors (168873240).

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

71253504 is an equidigital number, since it uses as much as digits as its factorization.

71253504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 71253504 is about 8441.1790645620. The cubic root of 71253504 is about 414.5740129742.

The spelling of 71253504 in words is "seventy-one million, two hundred fifty-three thousand, five hundred four".