264891245 has 4 divisors (see below), whose sum is σ = 317869500. Its totient is φ = 211912992.

The previous prime is 264891241. The next prime is 264891247. The reversal of 264891245 is 542198462.

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 53421481 + 211469764 = 7309^2 + 14542^2 .

It is a cyclic number.

It is not a de Polignac number, because 264891245 - 2² = 264891241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264891241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26489120 + ... + 26489129.

It is an arithmetic number, because the mean of its divisors is an integer number (79467375).

Almost surely, 2^264891245 is an apocalyptic number.

It is an amenable number.

264891245 is a deficient number, since it is larger than the sum of its proper divisors (52978255).

264891245 is an equidigital number, since it uses as much as digits as its factorization.

264891245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52978254.

The product of its digits is 138240, while the sum is 41.

The square root of 264891245 is about 16275.4798700376. The cubic root of 264891245 is about 642.2279488358.

The spelling of 264891245 in words is "two hundred sixty-four million, eight hundred ninety-one thousand, two hundred forty-five".