361281 has 4 divisors (see below), whose sum is σ = 481712. Its totient is φ = 240852.

The previous prime is 361279. The next prime is 361313. The reversal of 361281 is 182163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 361281 - 2¹ = 361279 is a prime.

It is a super-2 number, since 2×361281² = 261047921922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361281.

It is not an unprimeable number, because it can be changed into a prime (361211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60211 + ... + 60216.

It is an arithmetic number, because the mean of its divisors is an integer number (120428).

2³⁶¹²⁸¹ is an apocalyptic number.

It is an amenable number.

361281 is a deficient number, since it is larger than the sum of its proper divisors (120431).

361281 is a wasteful number, since it uses less digits than its factorization.

361281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120430.

The product of its digits is 288, while the sum is 21.

The square root of 361281 is about 601.0665520556. The cubic root of 361281 is about 71.2221436196. Note that the first 3 decimals are identical.

The spelling of 361281 in words is "three hundred sixty-one thousand, two hundred eighty-one".