123110261 has 8 divisors (see below), whose sum is σ = 125788824. Its totient is φ = 120453120.

The previous prime is 123110257. The next prime is 123110287. The reversal of 123110261 is 162011321.

It can be written as a sum of positive squares in 4 ways, for example, as 4431025 + 118679236 = 2105^2 + 10894^2 .

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 123110261 - 2² = 123110257 is a prime.

It is a super-2 number, since 2×123110261² = 30312272726976242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123110231) 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, 6545 + ... + 17001.

It is an arithmetic number, because the mean of its divisors is an integer number (15723603).

Almost surely, 2^123110261 is an apocalyptic number.

It is an amenable number.

123110261 is a deficient number, since it is larger than the sum of its proper divisors (2678563).

123110261 is a wasteful number, since it uses less digits than its factorization.

123110261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 123110261 is about 11095.5063426596. The cubic root of 123110261 is about 497.4675429782.

Adding to 123110261 its reverse (162011321), we get a palindrome (285121582).

The spelling of 123110261 in words is "one hundred twenty-three million, one hundred ten thousand, two hundred sixty-one".