264454021 has 4 divisors (see below), whose sum is σ = 284796652. Its totient is φ = 244111392.

The previous prime is 264453997. The next prime is 264454037. The reversal of 264454021 is 120454462.

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 20657025 + 243796996 = 4545^2 + 15614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264454021 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 (264454061) 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 3 ways as a sum of consecutive naturals, for example, 10171296 + ... + 10171321.

It is an arithmetic number, because the mean of its divisors is an integer number (71199163).

Almost surely, 2^264454021 is an apocalyptic number.

It is an amenable number.

264454021 is a deficient number, since it is larger than the sum of its proper divisors (20342631).

264454021 is a wasteful number, since it uses less digits than its factorization.

264454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20342630.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 264454021 is about 16262.0423379107. The cubic root of 264454021 is about 641.8744048655.

It can be divided in two parts, 2644 and 54021, that added together give a palindrome (56665).

The spelling of 264454021 in words is "two hundred sixty-four million, four hundred fifty-four thousand, twenty-one".