1161955 has 4 divisors (see below), whose sum is σ = 1394352. Its totient is φ = 929560.

The previous prime is 1161949. The next prime is 1161991. The reversal of 1161955 is 5591611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1161955 - 2³ = 1161947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116191 + ... + 116200.

It is an arithmetic number, because the mean of its divisors is an integer number (348588).

2^1161955 is an apocalyptic number.

1161955 is a deficient number, since it is larger than the sum of its proper divisors (232397).

1161955 is an equidigital number, since it uses as much as digits as its factorization.

1161955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232396.

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

The square root of 1161955 is about 1077.9401653153. The cubic root of 1161955 is about 105.1307517014.

It can be divided in two parts, 1161 and 955, that added together give a square (2116 = 46²).

The spelling of 1161955 in words is "one million, one hundred sixty-one thousand, nine hundred fifty-five".