71992141 has 6 divisors (see below), whose sum is σ = 77956170. Its totient is φ = 66454128.

The previous prime is 71992117. The next prime is 71992153. The reversal of 71992141 is 14129917.

It can be written as a sum of positive squares in 3 ways, for example, as 10055241 + 61936900 = 3171^2 + 7870^2 .

It is not a de Polignac number, because 71992141 - 2¹⁵ = 71959373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71992097 and 71992106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71992111) 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, 212826 + ... + 213163.

It is an arithmetic number, because the mean of its divisors is an integer number (12992695).

Almost surely, 2^71992141 is an apocalyptic number.

It is an amenable number.

71992141 is a deficient number, since it is larger than the sum of its proper divisors (5964029).

71992141 is a wasteful number, since it uses less digits than its factorization.

71992141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426015 (or 426002 counting only the distinct ones).

The product of its digits is 4536, while the sum is 34.

The square root of 71992141 is about 8484.8182655847. The cubic root of 71992141 is about 416.0016275978.

The spelling of 71992141 in words is "seventy-one million, nine hundred ninety-two thousand, one hundred forty-one".