1135261 has 2 divisors, whose sum is σ = 1135262. Its totient is φ = 1135260.

The previous prime is 1135247. The next prime is 1135279. The reversal of 1135261 is 1625311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 32761 = 1050^2 + 181^2 .

It is an emirp because it is prime and its reverse (1625311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1135261 - 2⁵ = 1135229 is a prime.

1135261 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567630 + 567631.

It is an arithmetic number, because the mean of its divisors is an integer number (567631).

2^1135261 is an apocalyptic number.

1135261 is the 477-th centered decagonal number.

It is an amenable number.

1135261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135261 is an equidigital number, since it uses as much as digits as its factorization.

1135261 is an evil number, because the sum of its binary digits is even.

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

The square root of 1135261 is about 1065.4862739613. The cubic root of 1135261 is about 104.3194381992.

The spelling of 1135261 in words is "one million, one hundred thirty-five thousand, two hundred sixty-one".