1242105507 has 12 divisors (see below), whose sum is σ = 1795784640. Its totient is φ = 827317008.

The previous prime is 1242105499. The next prime is 1242105511. The reversal of 1242105507 is 7055012421.

1242105507 is a `hidden beast` number, since 12 + 42 + 105 + 507 = 666.

It is not a de Polignac number, because 1242105507 - 2³ = 1242105499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242105517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52243 + ... + 72204.

It is an arithmetic number, because the mean of its divisors is an integer number (149648720).

Almost surely, 2^1242105507 is an apocalyptic number.

1242105507 is a deficient number, since it is larger than the sum of its proper divisors (553679133).

1242105507 is a wasteful number, since it uses less digits than its factorization.

1242105507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125562 (or 125559 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1242105507 is about 35243.5172336701. The cubic root of 1242105507 is about 1074.9447981750.

Adding to 1242105507 its reverse (7055012421), we get a palindrome (8297117928).

The spelling of 1242105507 in words is "one billion, two hundred forty-two million, one hundred five thousand, five hundred seven".