260646221 has 12 divisors (see below), whose sum is σ = 286986336. Its totient is φ = 236545320.

The previous prime is 260646187. The next prime is 260646223. The reversal of 260646221 is 122646062.

260646221 = T₃₉₅₈ + T₃₉₅₉ + ... + T₃₉₉₀.

260646221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 260646221 - 2⁶ = 260646157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260646223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86486 + ... + 89448.

It is an arithmetic number, because the mean of its divisors is an integer number (23915528).

Almost surely, 2^260646221 is an apocalyptic number.

It is an amenable number.

260646221 is a deficient number, since it is larger than the sum of its proper divisors (26340115).

260646221 is a wasteful number, since it uses less digits than its factorization.

260646221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712 (or 3701 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 260646221 is about 16144.5415233756. The cubic root of 260646221 is about 638.7787755159.

The spelling of 260646221 in words is "two hundred sixty million, six hundred forty-six thousand, two hundred twenty-one".