264994621 has 4 divisors (see below), whose sum is σ = 265068700. Its totient is φ = 264920544.

The previous prime is 264994619. The next prime is 264994637. The reversal of 264994621 is 126499462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126499462 = 2 ⋅63249731.

It can be written as a sum of positive squares in 2 ways, for example, as 130759225 + 134235396 = 11435^2 + 11586^2 .

It is a cyclic number.

It is not a de Polignac number, because 264994621 - 2¹ = 264994619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264994651) 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, 31386 + ... + 38923.

It is an arithmetic number, because the mean of its divisors is an integer number (66267175).

Almost surely, 2^264994621 is an apocalyptic number.

It is an amenable number.

264994621 is a deficient number, since it is larger than the sum of its proper divisors (74079).

264994621 is an equidigital number, since it uses as much as digits as its factorization.

264994621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74078.

The product of its digits is 186624, while the sum is 43.

The square root of 264994621 is about 16278.6553805896. The cubic root of 264994621 is about 642.3114828937.

The spelling of 264994621 in words is "two hundred sixty-four million, nine hundred ninety-four thousand, six hundred twenty-one".