71061520 has 40 divisors (see below), whose sum is σ = 173917440. Its totient is φ = 26928000.

The previous prime is 71061511. The next prime is 71061553. The reversal of 71061520 is 2516017.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 71061491 and 71061500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21856 + ... + 24895.

It is an arithmetic number, because the mean of its divisors is an integer number (4347936).

Almost surely, 2^71061520 is an apocalyptic number.

It is an amenable number.

71061520 is an abundant number, since it is smaller than the sum of its proper divisors (102855920).

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

71061520 is a wasteful number, since it uses less digits than its factorization.

71061520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46783 (or 46777 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 71061520 is about 8429.7995231203. The cubic root of 71061520 is about 414.2013381192.

Adding to 71061520 its reverse (2516017), we get a palindrome (73577537).

The spelling of 71061520 in words is "seventy-one million, sixty-one thousand, five hundred twenty".