260751561 has 8 divisors (see below), whose sum is σ = 397335744. Its totient is φ = 149000880.

The previous prime is 260751553. The next prime is 260751583. The reversal of 260751561 is 165157062.

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

It is not a de Polignac number, because 260751561 - 2³ = 260751553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (260751521) 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, 6208350 + ... + 6208391.

It is an arithmetic number, because the mean of its divisors is an integer number (49666968).

Almost surely, 2^260751561 is an apocalyptic number.

260751561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

260751561 is a deficient number, since it is larger than the sum of its proper divisors (136584183).

260751561 is a wasteful number, since it uses less digits than its factorization.

260751561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12416751.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 260751561 is about 16147.8035967744. The cubic root of 260751561 is about 638.8648179340.

The spelling of 260751561 in words is "two hundred sixty million, seven hundred fifty-one thousand, five hundred sixty-one".