71252520 has 64 divisors (see below), whose sum is σ = 214323840. Its totient is φ = 18950400.

The previous prime is 71252513. The next prime is 71252567. The reversal of 71252520 is 2525217.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 75250 + ... + 76190.

It is an arithmetic number, because the mean of its divisors is an integer number (3348810).

Almost surely, 2^71252520 is an apocalyptic number.

It is an amenable number.

71252520 is an abundant number, since it is smaller than the sum of its proper divisors (143071320).

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

71252520 is a wasteful number, since it uses less digits than its factorization.

71252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 71252520 is about 8441.1207786644. The cubic root of 71252520 is about 414.5721045642.

Adding to 71252520 its reverse (2525217), we get a palindrome (73777737).

The spelling of 71252520 in words is "seventy-one million, two hundred fifty-two thousand, five hundred twenty".