123140361 has 4 divisors (see below), whose sum is σ = 164187152. Its totient is φ = 82093572.

The previous prime is 123140327. The next prime is 123140371. The reversal of 123140361 is 163041321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123140361 - 2¹⁰ = 123139337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123140371) 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, 20523391 + ... + 20523396.

It is an arithmetic number, because the mean of its divisors is an integer number (41046788).

Almost surely, 2^123140361 is an apocalyptic number.

It is an amenable number.

123140361 is a deficient number, since it is larger than the sum of its proper divisors (41046791).

123140361 is an equidigital number, since it uses as much as digits as its factorization.

123140361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41046790.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 123140361 is about 11096.8626647355. The cubic root of 123140361 is about 497.5080826612.

Adding to 123140361 its reverse (163041321), we get a palindrome (286181682).

The spelling of 123140361 in words is "one hundred twenty-three million, one hundred forty thousand, three hundred sixty-one".