71320250 has 16 divisors (see below), whose sum is σ = 133511976. Its totient is φ = 28528000.

The previous prime is 71320237. The next prime is 71320283. The reversal of 71320250 is 5202317.

It can be written as a sum of positive squares in 4 ways, for example, as 5726449 + 65593801 = 2393^2 + 8099^2 .

It is a super-4 number, since 4×71320250⁴ (a number of 33 digits) contains 4444 as substring.

It is a Curzon number.

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, 142391 + ... + 142890.

Almost surely, 2^71320250 is an apocalyptic number.

71320250 is a deficient number, since it is larger than the sum of its proper divisors (62191726).

71320250 is a wasteful number, since it uses less digits than its factorization.

71320250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285298 (or 285288 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 71320250 is about 8445.1317337268. The cubic root of 71320250 is about 414.7034219145.

Adding to 71320250 its reverse (5202317), we get a palindrome (76522567).

The spelling of 71320250 in words is "seventy-one million, three hundred twenty thousand, two hundred fifty".