123142 has 8 divisors (see below), whose sum is σ = 192816. Its totient is φ = 58872.

The previous prime is 123127. The next prime is 123143. The reversal of 123142 is 241321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123143) by changing a digit.

123142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1293 + ... + 1384.

It is an arithmetic number, because the mean of its divisors is an integer number (24102).

2¹²³¹⁴² is an apocalyptic number.

123142 is a deficient number, since it is larger than the sum of its proper divisors (69674).

123142 is a wasteful number, since it uses less digits than its factorization.

123142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702.

The product of its digits is 48, while the sum is 13.

The square root of 123142 is about 350.9159443514. The cubic root of 123142 is about 49.7510289931.

Adding to 123142 its reverse (241321), we get a palindrome (364463).

The spelling of 123142 in words is "one hundred twenty-three thousand, one hundred forty-two", and thus it is an iban number.