84758121 has 24 divisors (see below), whose sum is σ = 140175360. Its totient is φ = 48344256.

The previous prime is 84758119. The next prime is 84758131. The reversal of 84758121 is 12185748.

It is not a de Polignac number, because 84758121 - 2¹ = 84758119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84758131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50136 + ... + 51798.

It is an arithmetic number, because the mean of its divisors is an integer number (5840640).

Almost surely, 2^84758121 is an apocalyptic number.

It is an amenable number.

84758121 is a deficient number, since it is larger than the sum of its proper divisors (55417239).

84758121 is a wasteful number, since it uses less digits than its factorization.

84758121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2482 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 84758121 is about 9206.4173813705. The cubic root of 84758121 is about 439.2655118666.

The spelling of 84758121 in words is "eighty-four million, seven hundred fifty-eight thousand, one hundred twenty-one".