71251000 has 64 divisors (see below), whose sum is σ = 170707680. Its totient is φ = 27820800.

The previous prime is 71250973. The next prime is 71251021. The reversal of 71251000 is 15217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42172 + ... + 43828.

Almost surely, 2^71251000 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 71251000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85353840).

71251000 is an abundant number, since it is smaller than the sum of its proper divisors (99456680).

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

71251000 is a wasteful number, since it uses less digits than its factorization.

71251000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1707 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 71251000 is about 8441.0307427470. The cubic root of 71251000 is about 414.5691565792.

Adding to 71251000 its reverse (15217), we get a palindrome (71266217).

The spelling of 71251000 in words is "seventy-one million, two hundred fifty-one thousand".