123355143 has 20 divisors (see below), whose sum is σ = 184858960. Its totient is φ = 81974592.

The previous prime is 123355139. The next prime is 123355171. The reversal of 123355143 is 341553321.

It is not a de Polignac number, because 123355143 - 2² = 123355139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123355123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25038 + ... + 29556.

It is an arithmetic number, because the mean of its divisors is an integer number (9242948).

Almost surely, 2^123355143 is an apocalyptic number.

123355143 is a deficient number, since it is larger than the sum of its proper divisors (61503817).

123355143 is an equidigital number, since it uses as much as digits as its factorization.

123355143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868 (or 4859 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 123355143 is about 11106.5360486517. The cubic root of 123355143 is about 497.7971666359.

The spelling of 123355143 in words is "one hundred twenty-three million, three hundred fifty-five thousand, one hundred forty-three".