1242864838 has 8 divisors (see below), whose sum is σ = 1866892320. Its totient is φ = 620567400.

The previous prime is 1242864827. The next prime is 1242864839. The reversal of 1242864838 is 8384682421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242864839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 430713 + ... + 433588.

It is an arithmetic number, because the mean of its divisors is an integer number (233361540).

Almost surely, 2^1242864838 is an apocalyptic number.

1242864838 is a deficient number, since it is larger than the sum of its proper divisors (624027482).

1242864838 is an equidigital number, since it uses as much as digits as its factorization.

1242864838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865022.

The product of its digits is 589824, while the sum is 46.

The square root of 1242864838 is about 35254.2882214349. The cubic root of 1242864838 is about 1075.1638006755.

The spelling of 1242864838 in words is "one billion, two hundred forty-two million, eight hundred sixty-four thousand, eight hundred thirty-eight".