264657121 has 4 divisors (see below), whose sum is σ = 264746644. Its totient is φ = 264567600.

The previous prime is 264657119. The next prime is 264657149. The reversal of 264657121 is 121756462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121756462 = 2 ⋅60878231.

It can be written as a sum of positive squares in 2 ways, for example, as 260499600 + 4157521 = 16140^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 264657121 - 2¹ = 264657119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264657181) 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, 40170 + ... + 46291.

It is an arithmetic number, because the mean of its divisors is an integer number (66186661).

Almost surely, 2^264657121 is an apocalyptic number.

It is an amenable number.

264657121 is a deficient number, since it is larger than the sum of its proper divisors (89523).

264657121 is an equidigital number, since it uses as much as digits as its factorization.

264657121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89522.

The product of its digits is 20160, while the sum is 34.

The square root of 264657121 is about 16268.2857425114. The cubic root of 264657121 is about 642.0386821088.

The spelling of 264657121 in words is "two hundred sixty-four million, six hundred fifty-seven thousand, one hundred twenty-one".