71572943 has 24 divisors (see below), whose sum is σ = 82698336. Its totient is φ = 61560000.

The previous prime is 71572939. The next prime is 71572967. The reversal of 71572943 is 34927517.

It is not a de Polignac number, because 71572943 - 2² = 71572939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71572897 and 71572906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71572913) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 473918 + ... + 474068.

It is an arithmetic number, because the mean of its divisors is an integer number (3445764).

Almost surely, 2^71572943 is an apocalyptic number.

71572943 is a deficient number, since it is larger than the sum of its proper divisors (11125393).

71572943 is a wasteful number, since it uses less digits than its factorization.

71572943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 284 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 71572943 is about 8460.0793731501. The cubic root of 71572943 is about 415.1926197327.

The spelling of 71572943 in words is "seventy-one million, five hundred seventy-two thousand, nine hundred forty-three".