1159561 has 8 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 1062480.

The previous prime is 1159541. The next prime is 1159577. The reversal of 1159561 is 1659511.

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 1159561 - 2⁹ = 1159049 is a prime.

1159561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1159531) 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, 2250 + ... + 2716.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^1159561 is an apocalyptic number.

It is an amenable number.

1159561 is a deficient number, since it is larger than the sum of its proper divisors (98423).

1159561 is a wasteful number, since it uses less digits than its factorization.

1159561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 1350, while the sum is 28.

The square root of 1159561 is about 1076.8291415076. The cubic root of 1159561 is about 105.0585010356.

The spelling of 1159561 in words is "one million, one hundred fifty-nine thousand, five hundred sixty-one".