265243420 has 48 divisors (see below), whose sum is σ = 631441440. Its totient is φ = 92779776.

The previous prime is 265243411. The next prime is 265243423. The reversal of 265243420 is 24342562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265243423) 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 15 ways as a sum of consecutive naturals, for example, 21907 + ... + 31786.

It is an arithmetic number, because the mean of its divisors is an integer number (13155030).

Almost surely, 2^265243420 is an apocalyptic number.

265243420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265243420 is an abundant number, since it is smaller than the sum of its proper divisors (366198020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265243420 is a wasteful number, since it uses less digits than its factorization.

265243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53734 (or 53732 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 265243420 is about 16286.2954658203. The cubic root of 265243420 is about 642.5124385042.

Adding to 265243420 its reverse (24342562), we get a palindrome (289585982).

The spelling of 265243420 in words is "two hundred sixty-five million, two hundred forty-three thousand, four hundred twenty".