71240123 has 2 divisors, whose sum is σ = 71240124. Its totient is φ = 71240122.

The previous prime is 71240107. The next prime is 71240129. The reversal of 71240123 is 32104217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71240123 - 2⁴ = 71240107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71240095 and 71240104.

It is not a weakly prime, because it can be changed into another prime (71240129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35620061 + 35620062.

It is an arithmetic number, because the mean of its divisors is an integer number (35620062).

Almost surely, 2^71240123 is an apocalyptic number.

71240123 is a deficient number, since it is larger than the sum of its proper divisors (1).

71240123 is an equidigital number, since it uses as much as digits as its factorization.

71240123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 71240123 is about 8440.3864248031. The cubic root of 71240123 is about 414.5480598077.

The spelling of 71240123 in words is "seventy-one million, two hundred forty thousand, one hundred twenty-three".