260642 has 10 divisors (see below), whose sum is σ = 412683.
Its totient is φ = 123462.
The previous prime is 260629. The next prime is 260647. The reversal of 260642 is 246062.
It can be written as a sum of positive squares in only one way, i.e., 130321 + 130321 = 361^2 + 361^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=361.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (260647) by changing a digit.
It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 13709 + ... + 13727.
260642 is a Friedman number, since it can be written as (20-6/6)^4*2, using all its digits and the basic arithmetic operations.
2260642 is an apocalyptic number.
260642 is a deficient number, since it is larger than the sum of its proper divisors (152041).
260642 is an frugal number, since it uses more digits than its factorization.
260642 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 78 (or 21 counting only the distinct ones).
The product of its (nonzero) digits is 576, while the sum is 20.
The square root of 260642 is about 510.5310960167.
The cubic root of 260642 is about 63.8775327292.
The spelling of 260642 in words is "two hundred sixty thousand, six hundred forty-two".