1206981171 has 36 divisors (see below), whose sum is σ = 1919978424. Its totient is φ = 730107840.

The previous prime is 1206981163. The next prime is 1206981173. The reversal of 1206981171 is 1711896021.

It is not a de Polignac number, because 1206981171 - 2³ = 1206981163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1206981173) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1037236 + ... + 1038398.

It is an arithmetic number, because the mean of its divisors is an integer number (53332734).

Almost surely, 2^1206981171 is an apocalyptic number.

1206981171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1206981171 is a deficient number, since it is larger than the sum of its proper divisors (712997253).

1206981171 is a wasteful number, since it uses less digits than its factorization.

1206981171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

The square root of 1206981171 is about 34741.6345470388. The cubic root of 1206981171 is about 1064.7153084178.

The spelling of 1206981171 in words is "one billion, two hundred six million, nine hundred eighty-one thousand, one hundred seventy-one".