1153261 has 2 divisors, whose sum is σ = 1153262. Its totient is φ = 1153260.

The previous prime is 1153249. The next prime is 1153267. The reversal of 1153261 is 1623511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799236 + 354025 = 894^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153261 - 2¹⁹ = 628973 is a prime.

1153261 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153267) 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 as a sum of consecutive naturals, namely, 576630 + 576631.

It is an arithmetic number, because the mean of its divisors is an integer number (576631).

2^1153261 is an apocalyptic number.

It is an amenable number.

1153261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153261 is an equidigital number, since it uses as much as digits as its factorization.

1153261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 1153261 is about 1073.8999022255. The cubic root of 1153261 is about 104.8678912986.

Adding to 1153261 its reverse (1623511), we get a palindrome (2776772).

The spelling of 1153261 in words is "one million, one hundred fifty-three thousand, two hundred sixty-one".