1135281 has 12 divisors (see below), whose sum is σ = 1761072. Its totient is φ = 648648.

The previous prime is 1135279. The next prime is 1135283. The reversal of 1135281 is 1825311.

It is an interprime number because it is at equal distance from previous prime (1135279) and next prime (1135283).

It is not a de Polignac number, because 1135281 - 2¹ = 1135279 is a prime.

It is a super-2 number, since 2×1135281² = 2577725897922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1135283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3715 + ... + 4008.

It is an arithmetic number, because the mean of its divisors is an integer number (146756).

2^1135281 is an apocalyptic number.

It is an amenable number.

1135281 is a deficient number, since it is larger than the sum of its proper divisors (625791).

1135281 is an equidigital number, since it uses as much as digits as its factorization.

1135281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740 (or 7733 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1135281 is about 1065.4956593060. The cubic root of 1135281 is about 104.3200507973.

The spelling of 1135281 in words is "one million, one hundred thirty-five thousand, two hundred eighty-one".