123565261 has 8 divisors (see below), whose sum is σ = 124566624. Its totient is φ = 122567760.

The previous prime is 123565241. The next prime is 123565271. The reversal of 123565261 is 162565321.

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 123565261 - 2⁷ = 123565133 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 (123565241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105666 + ... + 106828.

It is an arithmetic number, because the mean of its divisors is an integer number (15570828).

Almost surely, 2^123565261 is an apocalyptic number.

It is an amenable number.

123565261 is a deficient number, since it is larger than the sum of its proper divisors (1001363).

123565261 is a wasteful number, since it uses less digits than its factorization.

123565261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931.

The product of its digits is 10800, while the sum is 31.

The square root of 123565261 is about 11115.9912288558. The cubic root of 123565261 is about 498.0796486101.

The spelling of 123565261 in words is "one hundred twenty-three million, five hundred sixty-five thousand, two hundred sixty-one".