1242105331 has 8 divisors (see below), whose sum is σ = 1270672704. Its totient is φ = 1213627200.
The previous prime is 1242105301. The next prime is 1242105407. The reversal of 1242105331 is 1335012421.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1242105331 - 25 = 1242105299 is a prime.
It is a super-2 number, since 2×12421053312 = 3085651306597239122, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1242105301) 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 7 ways as a sum of consecutive naturals, for example, 6261 + ... + 50233.
It is an arithmetic number, because the mean of its divisors is an integer number (158834088).
Almost surely, 21242105331 is an apocalyptic number.
1242105331 is a deficient number, since it is larger than the sum of its proper divisors (28567373).
1242105331 is an equidigital number, since it uses as much as digits as its factorization.
1242105331 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 44621.
The product of its (nonzero) digits is 720, while the sum is 22.
The square root of 1242105331 is about 35243.5147367569. The cubic root of 1242105331 is about 1074.9447474036.
Adding to 1242105331 its reverse (1335012421), we get a palindrome (2577117752).
The spelling of 1242105331 in words is "one billion, two hundred forty-two million, one hundred five thousand, three hundred thirty-one".
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