70121128 has 64 divisors (see below), whose sum is σ = 166464000. Its totient is φ = 26896320.

The previous prime is 70121123. The next prime is 70121131. The reversal of 70121128 is 82112107.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 70121099 and 70121108.

It is not an unprimeable number, because it can be changed into a prime (70121123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40423 + ... + 42121.

It is an arithmetic number, because the mean of its divisors is an integer number (2601000).

Almost surely, 2^70121128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70121128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83232000).

70121128 is an abundant number, since it is smaller than the sum of its proper divisors (96342872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70121128 is a wasteful number, since it uses less digits than its factorization.

70121128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1786 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 70121128 is about 8373.8359190994. The cubic root of 70121128 is about 412.3661087342.

The spelling of 70121128 in words is "seventy million, one hundred twenty-one thousand, one hundred twenty-eight".