1242106999 has 16 divisors (see below), whose sum is σ = 1450080000. Its totient is φ = 1041928704.

The previous prime is 1242106997. The next prime is 1242107047. The reversal of 1242106999 is 9996012421.

It is a cyclic number.

It is not a de Polignac number, because 1242106999 - 2¹ = 1242106997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242106997) 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 15 ways as a sum of consecutive naturals, for example, 87127 + ... + 100375.

It is an arithmetic number, because the mean of its divisors is an integer number (90630000).

Almost surely, 2^1242106999 is an apocalyptic number.

1242106999 is a deficient number, since it is larger than the sum of its proper divisors (207973001).

1242106999 is a wasteful number, since it uses less digits than its factorization.

1242106999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13542.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1242106999 is about 35243.5384006771. The cubic root of 1242106999 is about 1074.9452285777.

It can be divided in two parts, 1242 and 106999, that added together give a square (108241 = 329²).

The spelling of 1242106999 in words is "one billion, two hundred forty-two million, one hundred six thousand, nine hundred ninety-nine".