1320171906 has 8 divisors (see below), whose sum is σ = 2640343824. Its totient is φ = 440057300.

The previous prime is 1320171869. The next prime is 1320171911. The reversal of 1320171906 is 6091710231.

It is a sphenic number, since it is the product of 3 distinct primes.

1320171906 is an admirable number.

It is a super-2 number, since 2×1320171906² = 3485707722783345672, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 110014320 + ... + 110014331.

It is an arithmetic number, because the mean of its divisors is an integer number (330042978).

Almost surely, 2^1320171906 is an apocalyptic number.

1320171906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320171906 is a wasteful number, since it uses less digits than its factorization.

1320171906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220028656.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1320171906 is about 36334.1699506126. The cubic root of 1320171906 is about 1097.0089281748.

The spelling of 1320171906 in words is "one billion, three hundred twenty million, one hundred seventy-one thousand, nine hundred six".