142012123 has 4 divisors (see below), whose sum is σ = 154922328. Its totient is φ = 129101920.

The previous prime is 142012121. The next prime is 142012139. The reversal of 142012123 is 321210241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321210241 = 11 ⋅29200931.

It is a cyclic number.

It is not a de Polignac number, because 142012123 - 2¹ = 142012121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142012097 and 142012106.

It is not an unprimeable number, because it can be changed into a prime (142012121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6455086 + ... + 6455107.

It is an arithmetic number, because the mean of its divisors is an integer number (38730582).

Almost surely, 2^142012123 is an apocalyptic number.

142012123 is a deficient number, since it is larger than the sum of its proper divisors (12910205).

142012123 is a wasteful number, since it uses less digits than its factorization.

142012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12910204.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 142012123 is about 11916.8839467371. The cubic root of 142012123 is about 521.7251909059.

Adding to 142012123 its reverse (321210241), we get a palindrome (463222364).

The spelling of 142012123 in words is "one hundred forty-two million, twelve thousand, one hundred twenty-three".