1173561 has 8 divisors (see below), whose sum is σ = 1656864. Its totient is φ = 736320.

The previous prime is 1173553. The next prime is 1173581. The reversal of 1173561 is 1653711.

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

It is not a de Polignac number, because 1173561 - 2³ = 1173553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1173511) 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, 11455 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (207108).

2^1173561 is an apocalyptic number.

It is an amenable number.

1173561 is a deficient number, since it is larger than the sum of its proper divisors (483303).

1173561 is a wasteful number, since it uses less digits than its factorization.

1173561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23031.

The product of its digits is 630, while the sum is 24.

The square root of 1173561 is about 1083.3102048813. The cubic root of 1173561 is about 105.4796199112.

The spelling of 1173561 in words is "one million, one hundred seventy-three thousand, five hundred sixty-one".