1242112775 has 24 divisors (see below), whose sum is σ = 1596661200. Its totient is φ = 957420800.

The previous prime is 1242112771. The next prime is 1242112793. The reversal of 1242112775 is 5772112421.

It is not a de Polignac number, because 1242112775 - 2² = 1242112771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242112771) 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 23 ways as a sum of consecutive naturals, for example, 411020 + ... + 414030.

It is an arithmetic number, because the mean of its divisors is an integer number (66527550).

Almost surely, 2^1242112775 is an apocalyptic number.

1242112775 is a deficient number, since it is larger than the sum of its proper divisors (354548425).

1242112775 is a wasteful number, since it uses less digits than its factorization.

1242112775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619 (or 3614 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 1242112775 is about 35243.6203446808. The cubic root of 1242112775 is about 1074.9468947987.

The spelling of 1242112775 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, seven hundred seventy-five".