123111340 has 24 divisors (see below), whose sum is σ = 282037392. Its totient is φ = 44767680.

The previous prime is 123111337. The next prime is 123111379. The reversal of 123111340 is 43111321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279579 + ... + 280018.

It is an arithmetic number, because the mean of its divisors is an integer number (11751558).

Almost surely, 2^123111340 is an apocalyptic number.

123111340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123111340 is an abundant number, since it is smaller than the sum of its proper divisors (158926052).

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

123111340 is a wasteful number, since it uses less digits than its factorization.

123111340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559617 (or 559615 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 123111340 is about 11095.5549658411. The cubic root of 123111340 is about 497.4689963255.

Adding to 123111340 its reverse (43111321), we get a palindrome (166222661).

The spelling of 123111340 in words is "one hundred twenty-three million, one hundred eleven thousand, three hundred forty".