71424520 has 16 divisors (see below), whose sum is σ = 160705260. Its totient is φ = 28569792.

The previous prime is 71424503. The next prime is 71424523. The reversal of 71424520 is 2542417.

It can be written as a sum of positive squares in 2 ways, for example, as 71199844 + 224676 = 8438^2 + 474^2 .

It is not an unprimeable number, because it can be changed into a prime (71424523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892767 + ... + 892846.

Almost surely, 2^71424520 is an apocalyptic number.

It is an amenable number.

71424520 is an abundant number, since it is smaller than the sum of its proper divisors (89280740).

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

71424520 is a wasteful number, since it uses less digits than its factorization.

71424520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785624 (or 1785620 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 71424520 is about 8451.3028581397. The cubic root of 71424520 is about 414.9054219080.

Adding to 71424520 its reverse (2542417), we get a palindrome (73966937).

The spelling of 71424520 in words is "seventy-one million, four hundred twenty-four thousand, five hundred twenty".