1242105534 has 12 divisors (see below), whose sum is σ = 2691228696. Its totient is φ = 414035172.

The previous prime is 1242105533. The next prime is 1242105539. The reversal of 1242105534 is 4355012421.

1242105534 is a `hidden beast` number, since 1 + 24 + 2 + 105 + 534 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1242105498 and 1242105507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242105533) 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 5 ways as a sum of consecutive naturals, for example, 34502914 + ... + 34502949.

It is an arithmetic number, because the mean of its divisors is an integer number (224269058).

Almost surely, 2^1242105534 is an apocalyptic number.

1242105534 is an abundant number, since it is smaller than the sum of its proper divisors (1449123162).

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

1242105534 is a wasteful number, since it uses less digits than its factorization.

1242105534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69005871 (or 69005868 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1242105534 is about 35243.5176167192. The cubic root of 1242105534 is about 1074.9448059638.

Adding to 1242105534 its reverse (4355012421), we get a palindrome (5597117955).

The spelling of 1242105534 in words is "one billion, two hundred forty-two million, one hundred five thousand, five hundred thirty-four".