1156841 has 6 divisors (see below), whose sum is σ = 1345770. Its totient is φ = 991536.

The previous prime is 1156823. The next prime is 1156847. The reversal of 1156841 is 1486511.

1156841 = 129² + 130² + ... + 177².

It can be written as a sum of positive squares in only one way, i.e., 802816 + 354025 = 896^2 + 595^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1156841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156841.

It is not an unprimeable number, because it can be changed into a prime (1156847) 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 5 ways as a sum of consecutive naturals, for example, 11756 + ... + 11853.

It is an arithmetic number, because the mean of its divisors is an integer number (224295).

2^1156841 is an apocalyptic number.

It is an amenable number.

1156841 is a deficient number, since it is larger than the sum of its proper divisors (188929).

1156841 is an equidigital number, since it uses as much as digits as its factorization.

1156841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23623 (or 23616 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 1156841 is about 1075.5654326911. The cubic root of 1156841 is about 104.9762909432.

It can be divided in two parts, 1156 and 841, that multiplied together give a square (972196 = 986²).

The spelling of 1156841 in words is "one million, one hundred fifty-six thousand, eight hundred forty-one".