1131965 has 16 divisors (see below), whose sum is σ = 1436160. Its totient is φ = 855360.

The previous prime is 1131961. The next prime is 1131973. The reversal of 1131965 is 5691311.

It is not a de Polignac number, because 1131965 - 2² = 1131961 is a prime.

It is a super-2 number, since 2×1131965² = 2562689522450, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10331 + ... + 10439.

It is an arithmetic number, because the mean of its divisors is an integer number (89760).

2^1131965 is an apocalyptic number.

It is an amenable number.

1131965 is a deficient number, since it is larger than the sum of its proper divisors (304195).

1131965 is a wasteful number, since it uses less digits than its factorization.

1131965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its digits is 810, while the sum is 26.

The square root of 1131965 is about 1063.9384380687. The cubic root of 1131965 is about 104.2183835637.

The spelling of 1131965 in words is "one million, one hundred thirty-one thousand, nine hundred sixty-five".