1161655 has 8 divisors (see below), whose sum is σ = 1520784. Its totient is φ = 844800.

The previous prime is 1161647. The next prime is 1161659. The reversal of 1161655 is 5561611.

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

It is not a de Polignac number, because 1161655 - 2³ = 1161647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10506 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (190098).

2^1161655 is an apocalyptic number.

1161655 is a deficient number, since it is larger than the sum of its proper divisors (359129).

1161655 is a wasteful number, since it uses less digits than its factorization.

1161655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21137.

The product of its digits is 900, while the sum is 25.

The square root of 1161655 is about 1077.8010020407. The cubic root of 1161655 is about 105.1217031753.

It can be divided in two parts, 116 and 1655, that added together give a palindrome (1771).

The spelling of 1161655 in words is "one million, one hundred sixty-one thousand, six hundred fifty-five".