1071561 has 8 divisors (see below), whose sum is σ = 1512864. Its totient is φ = 672320.

The previous prime is 1071541. The next prime is 1071563. The reversal of 1071561 is 1651701.

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

It is a cyclic number.

It is not a de Polignac number, because 1071561 - 2⁵ = 1071529 is a prime.

It is a super-2 number, since 2×1071561² = 2296485953442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10455 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (189108).

2^1071561 is an apocalyptic number.

It is an amenable number.

1071561 is a deficient number, since it is larger than the sum of its proper divisors (441303).

1071561 is a wasteful number, since it uses less digits than its factorization.

1071561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21031.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 1071561 is about 1035.1623061144. The cubic root of 1071561 is about 102.3306264838.

The spelling of 1071561 in words is "one million, seventy-one thousand, five hundred sixty-one".