123145124143 has 4 divisors (see below), whose sum is σ = 123146179200. Its totient is φ = 123144069088.

The previous prime is 123145124131. The next prime is 123145124149. The reversal of 123145124143 is 341421541321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123145124143 - 2⁵ = 123145124111 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 (123145124149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327055 + ... + 594352.

It is an arithmetic number, because the mean of its divisors is an integer number (30786544800).

Almost surely, 2^123145124143 is an apocalyptic number.

123145124143 is a deficient number, since it is larger than the sum of its proper divisors (1055057).

123145124143 is an equidigital number, since it uses as much as digits as its factorization.

123145124143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055056.

The product of its digits is 11520, while the sum is 31.

Adding to 123145124143 its reverse (341421541321), we get a palindrome (464566665464).

The spelling of 123145124143 in words is "one hundred twenty-three billion, one hundred forty-five million, one hundred twenty-four thousand, one hundred forty-three".