71200123 has 4 divisors (see below), whose sum is σ = 71288728. Its totient is φ = 71111520.

The previous prime is 71200121. The next prime is 71200127. The reversal of 71200123 is 32100217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32100217 = 73 ⋅439729.

It is a cyclic number.

It is not a de Polignac number, because 71200123 - 2¹ = 71200121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71200097 and 71200106.

It is not an unprimeable number, because it can be changed into a prime (71200121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43086 + ... + 44707.

It is an arithmetic number, because the mean of its divisors is an integer number (17822182).

Almost surely, 2^71200123 is an apocalyptic number.

71200123 is a deficient number, since it is larger than the sum of its proper divisors (88605).

71200123 is an equidigital number, since it uses as much as digits as its factorization.

71200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88604.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71200123 is about 8438.0165323374. The cubic root of 71200123 is about 414.4704582814.

The spelling of 71200123 in words is "seventy-one million, two hundred thousand, one hundred twenty-three".