70128243 has 12 divisors (see below), whose sum is σ = 101424960. Its totient is φ = 46692816.

The previous prime is 70128241. The next prime is 70128299. The reversal of 70128243 is 34282107.

It is not a de Polignac number, because 70128243 - 2¹ = 70128241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70128241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3253 + ... + 12281.

It is an arithmetic number, because the mean of its divisors is an integer number (8452080).

Almost surely, 2^70128243 is an apocalyptic number.

70128243 is a deficient number, since it is larger than the sum of its proper divisors (31296717).

70128243 is a wasteful number, since it uses less digits than its factorization.

70128243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9898 (or 9895 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 70128243 is about 8374.2607434925. The cubic root of 70128243 is about 412.3800554847.

The spelling of 70128243 in words is "seventy million, one hundred twenty-eight thousand, two hundred forty-three".