71389250 has 16 divisors (see below), whose sum is σ = 133641144. Its totient is φ = 28555600.

The previous prime is 71389247. The next prime is 71389291. The reversal of 71389250 is 5298317.

It can be written as a sum of positive squares in 4 ways, for example, as 3508129 + 67881121 = 1873^2 + 8239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71389250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142529 + ... + 143028.

Almost surely, 2^71389250 is an apocalyptic number.

71389250 is a deficient number, since it is larger than the sum of its proper divisors (62251894).

71389250 is a wasteful number, since it uses less digits than its factorization.

71389250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285574 (or 285564 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 71389250 is about 8449.2159399556. The cubic root of 71389250 is about 414.8371161233.

The spelling of 71389250 in words is "seventy-one million, three hundred eighty-nine thousand, two hundred fifty".