123781140 has 144 divisors (see below), whose sum is σ = 443089920. Its totient is φ = 27371520.

The previous prime is 123781123. The next prime is 123781159. The reversal of 123781140 is 41187321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37476 + ... + 40644.

Almost surely, 2^123781140 is an apocalyptic number.

123781140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123781140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221544960).

123781140 is an abundant number, since it is smaller than the sum of its proper divisors (319308780).

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

123781140 is a wasteful number, since it uses less digits than its factorization.

123781140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 123781140 is about 11125.6972815190. The cubic root of 123781140 is about 498.3695423281.

The spelling of 123781140 in words is "one hundred twenty-three million, seven hundred eighty-one thousand, one hundred forty".