1791081 has 12 divisors (see below), whose sum is σ = 2609152. Its totient is φ = 1183896.

The previous prime is 1791077. The next prime is 1791089. The reversal of 1791081 is 1801971.

It is not a de Polignac number, because 1791081 - 2² = 1791077 is a prime.

It is a super-2 number, since 2×1791081² = 6415942297122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1791089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360 + ... + 1926.

2^1791081 is an apocalyptic number.

It is an amenable number.

1791081 is a deficient number, since it is larger than the sum of its proper divisors (818071).

1791081 is a wasteful number, since it uses less digits than its factorization.

1791081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1791081 is about 1338.3127437187. The cubic root of 1791081 is about 121.4427917437.

The spelling of 1791081 in words is "one million, seven hundred ninety-one thousand, eighty-one".