123411240 has 96 divisors (see below), whose sum is σ = 414952200. Its totient is φ = 31772160.

The previous prime is 123411229. The next prime is 123411259. The reversal of 123411240 is 42114321.

123411240 is a `hidden beast` number, since 12 + 3 + 411 + 240 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 77686596 + 45724644 = 8814^2 + 6762^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4530 + ... + 16350.

Almost surely, 2^123411240 is an apocalyptic number.

123411240 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 123411240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207476100).

123411240 is an abundant number, since it is smaller than the sum of its proper divisors (291540960).

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

123411240 is a wasteful number, since it uses less digits than its factorization.

123411240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11867 (or 11860 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 123411240 is about 11109.0611664533. The cubic root of 123411240 is about 497.8726146337.

Adding to 123411240 its reverse (42114321), we get a palindrome (165525561).

The spelling of 123411240 in words is "one hundred twenty-three million, four hundred eleven thousand, two hundred forty".