84512140 has 12 divisors (see below), whose sum is σ = 177475536. Its totient is φ = 33804848.

The previous prime is 84512089. The next prime is 84512147. The reversal of 84512140 is 4121548.

It is not an unprimeable number, because it can be changed into a prime (84512147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2112784 + ... + 2112823.

It is an arithmetic number, because the mean of its divisors is an integer number (14789628).

Almost surely, 2^84512140 is an apocalyptic number.

It is an amenable number.

84512140 is an abundant number, since it is smaller than the sum of its proper divisors (92963396).

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

84512140 is a wasteful number, since it uses less digits than its factorization.

84512140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225616 (or 4225614 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 84512140 is about 9193.0484606577. The cubic root of 84512140 is about 438.8401616101.

Adding to 84512140 its reverse (4121548), we get a palindrome (88633688).

It can be divided in two parts, 84512 and 140, that multiplied together give a triangular number (11831680 = T₄₈₆₄).

The spelling of 84512140 in words is "eighty-four million, five hundred twelve thousand, one hundred forty".