123146240 has 104 divisors (see below), whose sum is σ = 338124480. Its totient is φ = 42172416.

The previous prime is 123146197. The next prime is 123146263. The reversal of 123146240 is 42641321.

It is a super-2 number, since 2×123146240² = 30329992852275200, which contains 22 as substring.

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, 142931 + ... + 143789.

Almost surely, 2^123146240 is an apocalyptic number.

123146240 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 123146240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169062240).

123146240 is an abundant number, since it is smaller than the sum of its proper divisors (214978240).

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

123146240 is an frugal number, since it uses more digits than its factorization.

123146240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 123146240 is about 11097.1275562643. The cubic root of 123146240 is about 497.5159999231.

Adding to 123146240 its reverse (42641321), we get a palindrome (165787561).

The spelling of 123146240 in words is "one hundred twenty-three million, one hundred forty-six thousand, two hundred forty".