265240642 has 8 divisors (see below), whose sum is σ = 408614076. Its totient is φ = 129035952.

The previous prime is 265240601. The next prime is 265240649. The reversal of 265240642 is 246042562.

It can be written as a sum of positive squares in 2 ways, for example, as 229492201 + 35748441 = 15149^2 + 5979^2 .

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

It is not an unprimeable number, because it can be changed into a prime (265240649) 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 3 ways as a sum of consecutive naturals, for example, 1792093 + ... + 1792240.

Almost surely, 2^265240642 is an apocalyptic number.

265240642 is a deficient number, since it is larger than the sum of its proper divisors (143373434).

265240642 is a wasteful number, since it uses less digits than its factorization.

265240642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584372.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 265240642 is about 16286.2101791669. The cubic root of 265240642 is about 642.5101954001.

The spelling of 265240642 in words is "two hundred sixty-five million, two hundred forty thousand, six hundred forty-two".