1156261 has 2 divisors, whose sum is σ = 1156262. Its totient is φ = 1156260.

The previous prime is 1156249. The next prime is 1156271. The reversal of 1156261 is 1626511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 136161 = 1010^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156261 - 2⁵ = 1156229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578130 + 578131.

It is an arithmetic number, because the mean of its divisors is an integer number (578131).

2^1156261 is an apocalyptic number.

It is an amenable number.

1156261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156261 is an equidigital number, since it uses as much as digits as its factorization.

1156261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1156261 is about 1075.2957732643. The cubic root of 1156261 is about 104.9587441852.

The spelling of 1156261 in words is "one million, one hundred fifty-six thousand, two hundred sixty-one".