1116261 has 10 divisors (see below), whose sum is σ = 1667622. Its totient is φ = 744120.

The previous prime is 1116257. The next prime is 1116277. The reversal of 1116261 is 1626111.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 136161 = 990^2 + 369^2 .

It is not a de Polignac number, because 1116261 - 2² = 1116257 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6810 + ... + 6971.

2^1116261 is an apocalyptic number.

It is an amenable number.

1116261 is a deficient number, since it is larger than the sum of its proper divisors (551361).

1116261 is an equidigital number, since it uses as much as digits as its factorization.

1116261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13793 (or 13784 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1116261 is about 1056.5325361767. The cubic root of 1116261 is about 103.7341892973.

It can be divided in two parts, 11 and 16261, that multiplied together give a palindrome (178871).

The spelling of 1116261 in words is "one million, one hundred sixteen thousand, two hundred sixty-one".