264642305 has 4 divisors (see below), whose sum is σ = 317570772. Its totient is φ = 211713840.

The previous prime is 264642251. The next prime is 264642307. The reversal of 264642305 is 503246462.

264642305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89794576 + 174847729 = 9476^2 + 13223^2 .

It is a de Polignac number, because none of the positive numbers 2^k-264642305 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (264642307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26464226 + ... + 26464235.

It is an arithmetic number, because the mean of its divisors is an integer number (79392693).

Almost surely, 2^264642305 is an apocalyptic number.

It is an amenable number.

264642305 is a deficient number, since it is larger than the sum of its proper divisors (52928467).

264642305 is an equidigital number, since it uses as much as digits as its factorization.

264642305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52928466.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 264642305 is about 16267.8303716261. The cubic root of 264642305 is about 642.0267010436.

Adding to 264642305 its reverse (503246462), we get a palindrome (767888767).

The spelling of 264642305 in words is "two hundred sixty-four million, six hundred forty-two thousand, three hundred five".