71045040 has 160 divisors (see below), whose sum is σ = 254555136. Its totient is φ = 16199680.

The previous prime is 71045033. The next prime is 71045063. The reversal of 71045040 is 4054017.

It is a junction number, because it is equal to n+sod(n) for n = 71044998 and 71045016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44089 + ... + 45671.

Almost surely, 2^71045040 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 71045040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127277568).

71045040 is an abundant number, since it is smaller than the sum of its proper divisors (183510096).

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

71045040 is a wasteful number, since it uses less digits than its factorization.

71045040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 71045040 is about 8428.8219817481. The cubic root of 71045040 is about 414.1693162608.

Adding to 71045040 its reverse (4054017), we get a palindrome (75099057).

The spelling of 71045040 in words is "seventy-one million, forty-five thousand, forty".