123320142 has 48 divisors (see below), whose sum is σ = 308638512. Its totient is φ = 35170560.

The previous prime is 123320137. The next prime is 123320147. The reversal of 123320142 is 241023321.

It is an interprime number because it is at equal distance from previous prime (123320137) and next prime (123320147).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320147) 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 23 ways as a sum of consecutive naturals, for example, 14953 + ... + 21684.

It is an arithmetic number, because the mean of its divisors is an integer number (6429969).

Almost surely, 2^123320142 is an apocalyptic number.

123320142 is an abundant number, since it is smaller than the sum of its proper divisors (185318370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123320142 is a wasteful number, since it uses less digits than its factorization.

123320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36673 (or 36670 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123320142 is about 11104.9602430626. The cubic root of 123320142 is about 497.7500802414.

Adding to 123320142 its reverse (241023321), we get a palindrome (364343463).

The spelling of 123320142 in words is "one hundred twenty-three million, three hundred twenty thousand, one hundred forty-two".