1081571 has 4 divisors (see below), whose sum is σ = 1102032. Its totient is φ = 1061112.

The previous prime is 1081541. The next prime is 1081583. The reversal of 1081571 is 1751801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10151 + ... + 10256.

It is an arithmetic number, because the mean of its divisors is an integer number (275508).

2^1081571 is an apocalyptic number.

1081571 is a deficient number, since it is larger than the sum of its proper divisors (20461).

1081571 is an equidigital number, since it uses as much as digits as its factorization.

1081571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20460.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 1081571 is about 1039.9860575989. The cubic root of 1081571 is about 102.6482803322.

The spelling of 1081571 in words is "one million, eighty-one thousand, five hundred seventy-one".