123421140 has 72 divisors (see below), whose sum is σ = 377395200. Its totient is φ = 32647104.

The previous prime is 123421121. The next prime is 123421171. The reversal of 123421140 is 41124321.

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

It is a congruent number.

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, 20161 + ... + 25559.

It is an arithmetic number, because the mean of its divisors is an integer number (5241600).

Almost surely, 2^123421140 is an apocalyptic number.

123421140 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 123421140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188697600).

123421140 is an abundant number, since it is smaller than the sum of its proper divisors (253974060).

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

123421140 is a wasteful number, since it uses less digits than its factorization.

123421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541 (or 5536 counting only the distinct ones).

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

The square root of 123421140 is about 11109.5067397252. The cubic root of 123421140 is about 497.8859273247.

Adding to 123421140 its reverse (41124321), we get a palindrome (164545461).

The spelling of 123421140 in words is "one hundred twenty-three million, four hundred twenty-one thousand, one hundred forty".