123506261 has 4 divisors (see below), whose sum is σ = 123702624. Its totient is φ = 123309900.

The previous prime is 123506237. The next prime is 123506281. The reversal of 123506261 is 162605321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123506261 - 2¹⁸ = 123244117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123506261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123506281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97235 + ... + 98496.

It is an arithmetic number, because the mean of its divisors is an integer number (30925656).

Almost surely, 2^123506261 is an apocalyptic number.

It is an amenable number.

123506261 is a deficient number, since it is larger than the sum of its proper divisors (196363).

123506261 is an equidigital number, since it uses as much as digits as its factorization.

123506261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196362.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 123506261 is about 11113.3370775839. The cubic root of 123506261 is about 498.0003615530. Note that the first 3 decimals are identical.

The spelling of 123506261 in words is "one hundred twenty-three million, five hundred six thousand, two hundred sixty-one".