71129123 has 8 divisors (see below), whose sum is σ = 77045808. Its totient is φ = 65276064.

The previous prime is 71129117. The next prime is 71129153. The reversal of 71129123 is 32192117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71129123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71129092 and 71129101.

It is not an unprimeable number, because it can be changed into a prime (71129153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13565 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (9630726).

Almost surely, 2^71129123 is an apocalyptic number.

71129123 is a deficient number, since it is larger than the sum of its proper divisors (5916685).

71129123 is a wasteful number, since it uses less digits than its factorization.

71129123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31813.

The product of its digits is 756, while the sum is 26.

The square root of 71129123 is about 8433.8083331316. The cubic root of 71129123 is about 414.3326439617.

The spelling of 71129123 in words is "seventy-one million, one hundred twenty-nine thousand, one hundred twenty-three".