123142051 has 4 divisors (see below), whose sum is σ = 123183504. Its totient is φ = 123100600.

The previous prime is 123142049. The next prime is 123142081. The reversal of 123142051 is 150241321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150241321 = 251 ⋅598571.

It is a cyclic number.

It is not a de Polignac number, because 123142051 - 2¹ = 123142049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123142001) 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, 15895 + ... + 22336.

It is an arithmetic number, because the mean of its divisors is an integer number (30795876).

Almost surely, 2^123142051 is an apocalyptic number.

123142051 is a deficient number, since it is larger than the sum of its proper divisors (41453).

123142051 is an equidigital number, since it uses as much as digits as its factorization.

123142051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41452.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123142051 is about 11096.9388121229. The cubic root of 123142051 is about 497.5103586136.

Adding to 123142051 its reverse (150241321), we get a palindrome (273383372).

It can be divided in two parts, 12314 and 2051, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 123142051 in words is "one hundred twenty-three million, one hundred forty-two thousand, fifty-one".