123242340 has 48 divisors (see below), whose sum is σ = 371625408. Its totient is φ = 30336384.

The previous prime is 123242263. The next prime is 123242347. The reversal of 123242340 is 43242321.

It is not an unprimeable number, because it can be changed into a prime (123242347) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 78222 + ... + 79781.

It is an arithmetic number, because the mean of its divisors is an integer number (7742196).

Almost surely, 2^123242340 is an apocalyptic number.

123242340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123242340 is an abundant number, since it is smaller than the sum of its proper divisors (248383068).

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

123242340 is a wasteful number, since it uses less digits than its factorization.

123242340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158028 (or 158026 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 123242340 is about 11101.4566611774. The cubic root of 123242340 is about 497.6453822903.

Adding to 123242340 its reverse (43242321), we get a palindrome (166484661).

The spelling of 123242340 in words is "one hundred twenty-three million, two hundred forty-two thousand, three hundred forty".