123142034240 has 56 divisors (see below), whose sum is σ = 293650809192. Its totient is φ = 49186457600.

The previous prime is 123142034237. The next prime is 123142034273. The reversal of 123142034240 is 42430241321.

It can be written as a sum of positive squares in 4 ways, for example, as 60957634816 + 62184399424 = 246896^2 + 249368^2 .

It is a congruent number.

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, 50159 + ... + 498798.

Almost surely, 2^123142034240 is an apocalyptic number.

123142034240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123142034240 is an abundant number, since it is smaller than the sum of its proper divisors (170508774952).

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

123142034240 is an equidigital number, since it uses as much as digits as its factorization.

123142034240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549675 (or 549665 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 123142034240 its reverse (42430241321), we get a palindrome (165572275561).

The spelling of 123142034240 in words is "one hundred twenty-three billion, one hundred forty-two million, thirty-four thousand, two hundred forty".