1230240042 has 32 divisors (see below), whose sum is σ = 2735890560. Its totient is φ = 409776480.

The previous prime is 1230240041. The next prime is 1230240083. The reversal of 1230240042 is 2400420321.

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

It is a junction number, because it is equal to n+sod(n) for n = 1230239997 and 1230240024.

It is not an unprimeable number, because it can be changed into a prime (1230240041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72283 + ... + 87665.

It is an arithmetic number, because the mean of its divisors is an integer number (85496580).

Almost surely, 2^1230240042 is an apocalyptic number.

1230240042 is an abundant number, since it is smaller than the sum of its proper divisors (1505650518).

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

1230240042 is a wasteful number, since it uses less digits than its factorization.

1230240042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16875 (or 16869 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1230240042 is about 35074.7778610214. Note that the first 3 decimals coincide. The cubic root of 1230240042 is about 1071.5109645895.

Adding to 1230240042 its reverse (2400420321), we get a palindrome (3630660363).

The spelling of 1230240042 in words is "one billion, two hundred thirty million, two hundred forty thousand, forty-two".