84128126 has 4 divisors (see below), whose sum is σ = 126192192. Its totient is φ = 42064062.

The previous prime is 84128123. The next prime is 84128147. The reversal of 84128126 is 62182148.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 84128092 and 84128101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84128123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21032030 + ... + 21032033.

It is an arithmetic number, because the mean of its divisors is an integer number (31548048).

Almost surely, 2^84128126 is an apocalyptic number.

84128126 is a deficient number, since it is larger than the sum of its proper divisors (42064066).

84128126 is a wasteful number, since it uses less digits than its factorization.

84128126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42064065.

The product of its digits is 6144, while the sum is 32.

The square root of 84128126 is about 9172.1385728738. The cubic root of 84128126 is about 438.1744716125.

The spelling of 84128126 in words is "eighty-four million, one hundred twenty-eight thousand, one hundred twenty-six".