164121642 has 24 divisors (see below), whose sum is σ = 359053344. Its totient is φ = 54175464.

The previous prime is 164121641. The next prime is 164121649. The reversal of 164121642 is 246121461.

164121642 is a `hidden beast` number, since 1 + 6 + 4 + 12 + 1 + 642 = 666.

It is not an unprimeable number, because it can be changed into a prime (164121641) 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 11 ways as a sum of consecutive naturals, for example, 42408 + ... + 46115.

It is an arithmetic number, because the mean of its divisors is an integer number (14960556).

Almost surely, 2^164121642 is an apocalyptic number.

164121642 is an abundant number, since it is smaller than the sum of its proper divisors (194931702).

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

164121642 is a wasteful number, since it uses less digits than its factorization.

164121642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88634 (or 88631 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 164121642 is about 12810.9969167118. The cubic root of 164121642 is about 547.5056657949.

The spelling of 164121642 in words is "one hundred sixty-four million, one hundred twenty-one thousand, six hundred forty-two".