1081420209 has 12 divisors (see below), whose sum is σ = 1562769936. Its totient is φ = 720615192.

The previous prime is 1081420159. The next prime is 1081420229. The reversal of 1081420209 is 9020241801.

It is not a de Polignac number, because 1081420209 - 2¹⁵ = 1081387441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1081420229) 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 11 ways as a sum of consecutive naturals, for example, 6099 + ... + 46904.

It is an arithmetic number, because the mean of its divisors is an integer number (130230828).

Almost surely, 2^1081420209 is an apocalyptic number.

It is an amenable number.

1081420209 is a deficient number, since it is larger than the sum of its proper divisors (481349727).

1081420209 is a wasteful number, since it uses less digits than its factorization.

1081420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55276 (or 55273 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1081420209 is about 32884.9541431944. The cubic root of 1081420209 is about 1026.4350975425.

The spelling of 1081420209 in words is "one billion, eighty-one million, four hundred twenty thousand, two hundred nine".