265840481 has 4 divisors (see below), whose sum is σ = 265873092. Its totient is φ = 265807872.

The previous prime is 265840459. The next prime is 265840499. The reversal of 265840481 is 184048562.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 184552225 + 81288256 = 13585^2 + 9016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265840481 is a prime.

It is a super-2 number, since 2×265840481² = 141342322676622722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265890481) 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, 7985 + ... + 24401.

It is an arithmetic number, because the mean of its divisors is an integer number (66468273).

Almost surely, 2^265840481 is an apocalyptic number.

It is an amenable number.

265840481 is a deficient number, since it is larger than the sum of its proper divisors (32611).

265840481 is a wasteful number, since it uses less digits than its factorization.

265840481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32610.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 265840481 is about 16304.6153281824. The cubic root of 265840481 is about 642.9941741581.

The spelling of 265840481 in words is "two hundred sixty-five million, eight hundred forty thousand, four hundred eighty-one".