123742573 has 4 divisors (see below), whose sum is σ = 130255360. Its totient is φ = 117229788.

The previous prime is 123742561. The next prime is 123742579. The reversal of 123742573 is 375247321.

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: 375247321 = 19 ⋅19749859.

It is a cyclic number.

It is not a de Polignac number, because 123742573 - 2⁹ = 123742061 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 (123742579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3256365 + ... + 3256402.

It is an arithmetic number, because the mean of its divisors is an integer number (32563840).

Almost surely, 2^123742573 is an apocalyptic number.

It is an amenable number.

123742573 is a deficient number, since it is larger than the sum of its proper divisors (6512787).

123742573 is an equidigital number, since it uses as much as digits as its factorization.

123742573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512786.

The product of its digits is 35280, while the sum is 34.

The square root of 123742573 is about 11123.9639068095. The cubic root of 123742573 is about 498.3177772673.

Adding to 123742573 its reverse (375247321), we get a palindrome (498989894).

The spelling of 123742573 in words is "one hundred twenty-three million, seven hundred forty-two thousand, five hundred seventy-three".