265297540 has 24 divisors (see below), whose sum is σ = 566260632. Its totient is φ = 104378880.

The previous prime is 265297531. The next prime is 265297541. The reversal of 265297540 is 45792562.

It can be written as a sum of positive squares in 4 ways, for example, as 2079364 + 263218176 = 1442^2 + 16224^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 265297493 and 265297502.

It is not an unprimeable number, because it can be changed into a prime (265297541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107509 + ... + 109948.

It is an arithmetic number, because the mean of its divisors is an integer number (23594193).

Almost surely, 2^265297540 is an apocalyptic number.

265297540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265297540 is an abundant number, since it is smaller than the sum of its proper divisors (300963092).

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

265297540 is a wasteful number, since it uses less digits than its factorization.

265297540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217527 (or 217525 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 265297540 is about 16287.9569007288. The cubic root of 265297540 is about 642.5561347291.

The spelling of 265297540 in words is "two hundred sixty-five million, two hundred ninety-seven thousand, five hundred forty".