1205478206 has 16 divisors (see below), whose sum is σ = 1902279600. Its totient is φ = 572089728.

The previous prime is 1205478191. The next prime is 1205478221. The reversal of 1205478206 is 6028745021.

It is an interprime number because it is at equal distance from previous prime (1205478191) and next prime (1205478221).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172715 + ... + 179558.

It is an arithmetic number, because the mean of its divisors is an integer number (118892475).

Almost surely, 2^1205478206 is an apocalyptic number.

1205478206 is a deficient number, since it is larger than the sum of its proper divisors (696801394).

1205478206 is a wasteful number, since it uses less digits than its factorization.

1205478206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352363.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1205478206 is about 34719.9972062211. The cubic root of 1205478206 is about 1064.2731875966.

The spelling of 1205478206 in words is "one billion, two hundred five million, four hundred seventy-eight thousand, two hundred six".