164321265 has 16 divisors (see below), whose sum is σ = 264240000. Its totient is φ = 87196032.

The previous prime is 164321263. The next prime is 164321273. The reversal of 164321265 is 562123461.

It is not a de Polignac number, because 164321265 - 2¹ = 164321263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164321263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24540 + ... + 30509.

It is an arithmetic number, because the mean of its divisors is an integer number (16515000).

Almost surely, 2^164321265 is an apocalyptic number.

164321265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164321265 is a deficient number, since it is larger than the sum of its proper divisors (99918735).

164321265 is a wasteful number, since it uses less digits than its factorization.

164321265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55256.

The product of its digits is 8640, while the sum is 30.

The square root of 164321265 is about 12818.7856289120. The cubic root of 164321265 is about 547.7275549578.

The spelling of 164321265 in words is "one hundred sixty-four million, three hundred twenty-one thousand, two hundred sixty-five".