36021281 has 2 divisors, whose sum is σ = 36021282. Its totient is φ = 36021280.

The previous prime is 36021259. The next prime is 36021299. The reversal of 36021281 is 18212063.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31360000 + 4661281 = 5600^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 36021281 - 2⁶ = 36021217 is a prime.

It is a super-2 number, since 2×36021281² = 2595065369761922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36021481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18010640 + 18010641.

It is an arithmetic number, because the mean of its divisors is an integer number (18010641).

Almost surely, 2^36021281 is an apocalyptic number.

It is an amenable number.

36021281 is a deficient number, since it is larger than the sum of its proper divisors (1).

36021281 is an equidigital number, since it uses as much as digits as its factorization.

36021281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 36021281 is about 6001.7731546602. The cubic root of 36021281 is about 330.2577753267.

The spelling of 36021281 in words is "thirty-six million, twenty-one thousand, two hundred eighty-one".