164512140 has 48 divisors (see below), whose sum is σ = 496069728. Its totient is φ = 40495104.

The previous prime is 164512129. The next prime is 164512141. The reversal of 164512140 is 41215461.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 164512140.

It is not an unprimeable number, because it can be changed into a prime (164512141) 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, 104677 + ... + 106236.

It is an arithmetic number, because the mean of its divisors is an integer number (10334786).

Almost surely, 2^164512140 is an apocalyptic number.

164512140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164512140 is an abundant number, since it is smaller than the sum of its proper divisors (331557588).

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

164512140 is a wasteful number, since it uses less digits than its factorization.

164512140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210938 (or 210936 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 164512140 is about 12826.2285961229. The cubic root of 164512140 is about 547.9395523571.

The spelling of 164512140 in words is "one hundred sixty-four million, five hundred twelve thousand, one hundred forty".