261023 has 8 divisors (see below), whose sum is σ = 304800. Its totient is φ = 223440.
The previous prime is 261017. The next prime is 261031. The reversal of 261023 is 320162.
It is not a de Polignac number, because 261023 - 26 = 260959 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 260989 and 261007.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (261013) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38 + ... + 723.
It is an arithmetic number, because the mean of its divisors is an integer number (38100).
2261023 is an apocalyptic number.
261023 is a deficient number, since it is larger than the sum of its proper divisors (43777).
261023 is an frugal number, since it uses more digits than its factorization.
261023 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 782 (or 768 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 14.
The square root of 261023 is about 510.9041005903. The cubic root of 261023 is about 63.9086424391.
Adding to 261023 its reverse (320162), we get a palindrome (581185).
The spelling of 261023 in words is "two hundred sixty-one thousand, twenty-three".
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