70128123 has 8 divisors (see below), whose sum is σ = 100696848. Its totient is φ = 43155744.

The previous prime is 70128109. The next prime is 70128131. The reversal of 70128123 is 32182107.

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

It is not a de Polignac number, because 70128123 - 2⁶ = 70128059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70128093 and 70128102.

It is not an unprimeable number, because it can be changed into a prime (70128193) 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, 899040 + ... + 899117.

It is an arithmetic number, because the mean of its divisors is an integer number (12587106).

Almost surely, 2^70128123 is an apocalyptic number.

70128123 is a deficient number, since it is larger than the sum of its proper divisors (30568725).

70128123 is a wasteful number, since it uses less digits than its factorization.

70128123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798173.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 70128123 is about 8374.2535786779. The cubic root of 70128123 is about 412.3798202697.

The spelling of 70128123 in words is "seventy million, one hundred twenty-eight thousand, one hundred twenty-three".