164121243 has 16 divisors (see below), whose sum is σ = 257085696. Its totient is φ = 91815840.

The previous prime is 164121203. The next prime is 164121253. The reversal of 164121243 is 342121461.

It is not a de Polignac number, because 164121243 - 2¹⁷ = 163990171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164121203) 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 15 ways as a sum of consecutive naturals, for example, 190855 + ... + 191712.

It is an arithmetic number, because the mean of its divisors is an integer number (16067856).

Almost surely, 2^164121243 is an apocalyptic number.

164121243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

164121243 is a deficient number, since it is larger than the sum of its proper divisors (92964453).

164121243 is a wasteful number, since it uses less digits than its factorization.

164121243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382594.

The product of its digits is 1152, while the sum is 24.

The square root of 164121243 is about 12810.9813441438. The cubic root of 164121243 is about 547.5052221099.

The spelling of 164121243 in words is "one hundred sixty-four million, one hundred twenty-one thousand, two hundred forty-three".