1206642003 has 12 divisors (see below), whose sum is σ = 1871526600. Its totient is φ = 689509632.

The previous prime is 1206642001. The next prime is 1206642007. The reversal of 1206642003 is 3002466021.

It is not a de Polignac number, because 1206642003 - 2¹ = 1206642001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1206642001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4104078 + ... + 4104371.

It is an arithmetic number, because the mean of its divisors is an integer number (155960550).

Almost surely, 2^1206642003 is an apocalyptic number.

1206642003 is a deficient number, since it is larger than the sum of its proper divisors (664884597).

1206642003 is an equidigital number, since it uses as much as digits as its factorization.

1206642003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208466 (or 8208459 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1206642003 is about 34736.7529138807. The cubic root of 1206642003 is about 1064.6155688911.

The spelling of 1206642003 in words is "one billion, two hundred six million, six hundred forty-two thousand, three".