265481281 has 16 divisors (see below), whose sum is σ = 301674240. Its totient is φ = 231603840.

The previous prime is 265481263. The next prime is 265481287. The reversal of 265481281 is 182184562.

It is a de Polignac number, because none of the positive numbers 2^k-265481281 is a prime.

It is a super-2 number, since 2×265481281² = 140960621122801922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265481281.

It is not an unprimeable number, because it can be changed into a prime (265481287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127656 + ... + 129718.

It is an arithmetic number, because the mean of its divisors is an integer number (18854640).

Almost surely, 2^265481281 is an apocalyptic number.

It is an amenable number.

265481281 is a deficient number, since it is larger than the sum of its proper divisors (36192959).

265481281 is a wasteful number, since it uses less digits than its factorization.

265481281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its digits is 30720, while the sum is 37.

The square root of 265481281 is about 16293.5963187996. The cubic root of 265481281 is about 642.7044419980.

The spelling of 265481281 in words is "two hundred sixty-five million, four hundred eighty-one thousand, two hundred eighty-one".