1242123234 has 64 divisors (see below), whose sum is σ = 2854241280. Its totient is φ = 356685120.

The previous prime is 1242123217. The next prime is 1242123277. The reversal of 1242123234 is 4323212421.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161709 + ... + 169215.

It is an arithmetic number, because the mean of its divisors is an integer number (44597520).

Almost surely, 2^1242123234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242123234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427120640).

1242123234 is an abundant number, since it is smaller than the sum of its proper divisors (1612118046).

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

1242123234 is a wasteful number, since it uses less digits than its factorization.

1242123234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655.

The product of its digits is 2304, while the sum is 24.

The square root of 1242123234 is about 35243.7687258329. The cubic root of 1242123234 is about 1074.9499119262.

Adding to 1242123234 its reverse (4323212421), we get a palindrome (5565335655).

The spelling of 1242123234 in words is "one billion, two hundred forty-two million, one hundred twenty-three thousand, two hundred thirty-four".