260987645 has 8 divisors (see below), whose sum is σ = 315260160. Its totient is φ = 207406800.

The previous prime is 260987641. The next prime is 260987669. The reversal of 260987645 is 546789062.

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

It is not a de Polignac number, because 260987645 - 2² = 260987641 is a prime.

It is a super-3 number, since 3×260987645³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 260987645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260987641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172085 + ... + 173594.

It is an arithmetic number, because the mean of its divisors is an integer number (39407520).

Almost surely, 2^260987645 is an apocalyptic number.

It is an amenable number.

260987645 is a deficient number, since it is larger than the sum of its proper divisors (54272515).

260987645 is a wasteful number, since it uses less digits than its factorization.

260987645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345835.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 260987645 is about 16155.1120392277. The cubic root of 260987645 is about 639.0575687972.

The spelling of 260987645 in words is "two hundred sixty million, nine hundred eighty-seven thousand, six hundred forty-five".