123433261 has 4 divisors (see below), whose sum is σ = 141066592. Its totient is φ = 105799932.

The previous prime is 123433259. The next prime is 123433267. The reversal of 123433261 is 162334321.

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 not a de Polignac number, because 123433261 - 2¹ = 123433259 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 (123433267) 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, 8816655 + ... + 8816668.

It is an arithmetic number, because the mean of its divisors is an integer number (35266648).

Almost surely, 2^123433261 is an apocalyptic number.

It is an amenable number.

123433261 is a deficient number, since it is larger than the sum of its proper divisors (17633331).

123433261 is an equidigital number, since it uses as much as digits as its factorization.

123433261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17633330.

The product of its digits is 2592, while the sum is 25.

The square root of 123433261 is about 11110.0522501022. The cubic root of 123433261 is about 497.9022256611.

Adding to 123433261 its reverse (162334321), we get a palindrome (285767582).

The spelling of 123433261 in words is "one hundred twenty-three million, four hundred thirty-three thousand, two hundred sixty-one".