123140422 has 4 divisors (see below), whose sum is σ = 184710636. Its totient is φ = 61570210.

The previous prime is 123140419. The next prime is 123140429. The reversal of 123140422 is 224041321.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123140422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30785104 + ... + 30785107.

It is an arithmetic number, because the mean of its divisors is an integer number (46177659).

Almost surely, 2^123140422 is an apocalyptic number.

123140422 is a deficient number, since it is larger than the sum of its proper divisors (61570214).

123140422 is an equidigital number, since it uses as much as digits as its factorization.

123140422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61570213.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123140422 is about 11096.8654132597. The cubic root of 123140422 is about 497.5081648113.

Adding to 123140422 its reverse (224041321), we get a palindrome (347181743).

The spelling of 123140422 in words is "one hundred twenty-three million, one hundred forty thousand, four hundred twenty-two".