123508461 has 4 divisors (see below), whose sum is σ = 164677952. Its totient is φ = 82338972.

The previous prime is 123508457. The next prime is 123508471. The reversal of 123508461 is 164805321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 164805321 = 3 ⋅54935107.

It is not a de Polignac number, because 123508461 - 2² = 123508457 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 (123508471) 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 3 ways as a sum of consecutive naturals, for example, 20584741 + ... + 20584746.

It is an arithmetic number, because the mean of its divisors is an integer number (41169488).

Almost surely, 2^123508461 is an apocalyptic number.

It is an amenable number.

123508461 is a deficient number, since it is larger than the sum of its proper divisors (41169491).

123508461 is an equidigital number, since it uses as much as digits as its factorization.

123508461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41169490.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 123508461 is about 11113.4360573137. The cubic root of 123508461 is about 498.0033184727.

The spelling of 123508461 in words is "one hundred twenty-three million, five hundred eight thousand, four hundred sixty-one".