140123142 has 16 divisors (see below), whose sum is σ = 311384880. Its totient is φ = 46707696.

The previous prime is 140123077. The next prime is 140123143. The reversal of 140123142 is 241321041.

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 (140123143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297383 + ... + 1297490.

It is an arithmetic number, because the mean of its divisors is an integer number (19461555).

Almost surely, 2^140123142 is an apocalyptic number.

140123142 is an abundant number, since it is smaller than the sum of its proper divisors (171261738).

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

140123142 is a wasteful number, since it uses less digits than its factorization.

140123142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594884 (or 2594878 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 140123142 is about 11837.3621216891. The cubic root of 140123142 is about 519.4016070249.

Adding to 140123142 its reverse (241321041), we get a palindrome (381444183).

The spelling of 140123142 in words is "one hundred forty million, one hundred twenty-three thousand, one hundred forty-two".