260521705 has 8 divisors (see below), whose sum is σ = 319277952. Its totient is φ = 203982768.

The previous prime is 260521693. The next prime is 260521721. The reversal of 260521705 is 507125062.

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

It is a cyclic number.

It is not a de Polignac number, because 260521705 - 2¹¹ = 260519657 is a prime.

It is a super-2 number, since 2×260521705² = 135743117552214050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554067 + ... + 554536.

It is an arithmetic number, because the mean of its divisors is an integer number (39909744).

Almost surely, 2^260521705 is an apocalyptic number.

It is an amenable number.

260521705 is a deficient number, since it is larger than the sum of its proper divisors (58756247).

260521705 is a wasteful number, since it uses less digits than its factorization.

260521705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108655.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 260521705 is about 16140.6847748167. The cubic root of 260521705 is about 638.6770401103.

Adding to 260521705 its reverse (507125062), we get a palindrome (767646767).

It can be divided in two parts, 2605 and 21705, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 260521705 in words is "two hundred sixty million, five hundred twenty-one thousand, seven hundred five".