71751725 has 12 divisors (see below), whose sum is σ = 89348820. Its totient is φ = 57158400.

The previous prime is 71751721. The next prime is 71751731. The reversal of 71751725 is 52715717.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 619369 + 71132356 = 787^2 + 8434^2 .

It is not a de Polignac number, because 71751725 - 2² = 71751721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71751721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71 + ... + 11979.

It is an arithmetic number, because the mean of its divisors is an integer number (7445735).

Almost surely, 2^71751725 is an apocalyptic number.

It is an amenable number.

71751725 is a deficient number, since it is larger than the sum of its proper divisors (17597095).

71751725 is a wasteful number, since it uses less digits than its factorization.

71751725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12160 (or 12155 counting only the distinct ones).

The product of its digits is 17150, while the sum is 35.

The square root of 71751725 is about 8470.6389959672. The cubic root of 71751725 is about 415.5380353976.

The spelling of 71751725 in words is "seventy-one million, seven hundred fifty-one thousand, seven hundred twenty-five".