1161255 has 8 divisors (see below), whose sum is σ = 1858032. Its totient is φ = 619328.

The previous prime is 1161241. The next prime is 1161263. The reversal of 1161255 is 5521611.

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 1161255 - 2⁴ = 1161239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38694 + ... + 38723.

It is an arithmetic number, because the mean of its divisors is an integer number (232254).

2^1161255 is an apocalyptic number.

1161255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161255 is a deficient number, since it is larger than the sum of its proper divisors (696777).

1161255 is an equidigital number, since it uses as much as digits as its factorization.

1161255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77425.

The product of its digits is 300, while the sum is 21.

The square root of 1161255 is about 1077.6154230522. The cubic root of 1161255 is about 105.1096360503.

Adding to 1161255 its reverse (5521611), we get a palindrome (6682866).

The spelling of 1161255 in words is "one million, one hundred sixty-one thousand, two hundred fifty-five".