71782501 has 6 divisors (see below), whose sum is σ = 83502150. Its totient is φ = 61527816.

The previous prime is 71782463. The next prime is 71782507. The reversal of 71782501 is 10528717.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71385601 + 396900 = 8449^2 + 630^2 .

It is not a de Polignac number, because 71782501 - 2¹¹ = 71780453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71782507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 732426 + ... + 732523.

It is an arithmetic number, because the mean of its divisors is an integer number (13917025).

Almost surely, 2^71782501 is an apocalyptic number.

It is an amenable number.

71782501 is a deficient number, since it is larger than the sum of its proper divisors (11719649).

71782501 is a wasteful number, since it uses less digits than its factorization.

71782501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464963 (or 1464956 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 71782501 is about 8472.4554292130. The cubic root of 71782501 is about 415.5974382462.

The spelling of 71782501 in words is "seventy-one million, seven hundred eighty-two thousand, five hundred one".