1242644105 has 8 divisors (see below), whose sum is σ = 1493251200. Its totient is φ = 992729776.

The previous prime is 1242644093. The next prime is 1242644111. The reversal of 1242644105 is 5014462421.

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 1242644105 - 2⁴ = 1242644089 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 169235 + ... + 176424.

It is an arithmetic number, because the mean of its divisors is an integer number (186656400).

Almost surely, 2^1242644105 is an apocalyptic number.

It is an amenable number.

1242644105 is a deficient number, since it is larger than the sum of its proper divisors (250607095).

1242644105 is an equidigital number, since it uses as much as digits as its factorization.

1242644105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346383.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1242644105 is about 35251.1574987262. The cubic root of 1242644105 is about 1075.1001471510.

The spelling of 1242644105 in words is "one billion, two hundred forty-two million, six hundred forty-four thousand, one hundred five".