264343421 has 8 divisors (see below), whose sum is σ = 282462840. Its totient is φ = 246509568.

The previous prime is 264343399. The next prime is 264343483. The reversal of 264343421 is 124343462.

It can be written as a sum of positive squares in 4 ways, for example, as 25300900 + 239042521 = 5030^2 + 15461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264343421 - 2¹⁸ = 264081277 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 (264343621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69476 + ... + 73181.

It is an arithmetic number, because the mean of its divisors is an integer number (35307855).

Almost surely, 2^264343421 is an apocalyptic number.

It is an amenable number.

264343421 is a deficient number, since it is larger than the sum of its proper divisors (18119419).

264343421 is a wasteful number, since it uses less digits than its factorization.

264343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142783.

The product of its digits is 13824, while the sum is 29.

The square root of 264343421 is about 16258.6414254082. The cubic root of 264343421 is about 641.7849107853.

Adding to 264343421 its reverse (124343462), we get a palindrome (388686883).

It can be divided in two parts, 2643 and 43421, that added together give a palindrome (46064).

The spelling of 264343421 in words is "two hundred sixty-four million, three hundred forty-three thousand, four hundred twenty-one".