123217140 has 24 divisors (see below), whose sum is σ = 345008160. Its totient is φ = 32857888.

The previous prime is 123217123. The next prime is 123217151. The reversal of 123217140 is 41712321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026750 + ... + 1026869.

It is an arithmetic number, because the mean of its divisors is an integer number (14375340).

Almost surely, 2^123217140 is an apocalyptic number.

123217140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123217140 is an abundant number, since it is smaller than the sum of its proper divisors (221791020).

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

123217140 is a wasteful number, since it uses less digits than its factorization.

123217140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053631 (or 2053629 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 123217140 is about 11100.3216169623. The cubic root of 123217140 is about 497.6114612680.

Adding to 123217140 its reverse (41712321), we get a palindrome (164929461).

The spelling of 123217140 in words is "one hundred twenty-three million, two hundred seventeen thousand, one hundred forty".