71862081 has 4 divisors (see below), whose sum is σ = 95816112. Its totient is φ = 47908052.

The previous prime is 71862067. The next prime is 71862137. The reversal of 71862081 is 18026817.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71862081 - 2⁶ = 71862017 is a prime.

It is a super-2 number, since 2×71862081² = 10328317371301122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71862041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11977011 + ... + 11977016.

It is an arithmetic number, because the mean of its divisors is an integer number (23954028).

Almost surely, 2^71862081 is an apocalyptic number.

It is an amenable number.

71862081 is a deficient number, since it is larger than the sum of its proper divisors (23954031).

71862081 is a wasteful number, since it uses less digits than its factorization.

71862081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23954030.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 71862081 is about 8477.1505236135. The cubic root of 71862081 is about 415.7509623374.

Adding to 71862081 its reverse (18026817), we get a palindrome (89888898).

The spelling of 71862081 in words is "seventy-one million, eight hundred sixty-two thousand, eighty-one".