84123135 has 12 divisors (see below), whose sum is σ = 145813512. Its totient is φ = 44865648.

The previous prime is 84123133. The next prime is 84123161. The reversal of 84123135 is 53132148.

It is a happy number.

It is not a de Polignac number, because 84123135 - 2¹ = 84123133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84123099 and 84123108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934657 + ... + 934746.

It is an arithmetic number, because the mean of its divisors is an integer number (12151126).

Almost surely, 2^84123135 is an apocalyptic number.

84123135 is a deficient number, since it is larger than the sum of its proper divisors (61690377).

84123135 is a wasteful number, since it uses less digits than its factorization.

84123135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869414 (or 1869411 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 84123135 is about 9171.8664948853. The cubic root of 84123135 is about 438.1658063692.

The spelling of 84123135 in words is "eighty-four million, one hundred twenty-three thousand, one hundred thirty-five".