366381 has 6 divisors (see below), whose sum is σ = 529230. Its totient is φ = 244248.

The previous prime is 366347. The next prime is 366383. The reversal of 366381 is 183663.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 81225 = 534^2 + 285^2 .

It is not a de Polignac number, because 366381 - 2¹⁰ = 365357 is a prime.

It is a super-2 number, since 2×366381² = 268470074322, which contains 22 as substring.

366381 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366383) 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 in 5 ways as a sum of consecutive naturals, for example, 20346 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (88205).

2³⁶⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

366381 is a deficient number, since it is larger than the sum of its proper divisors (162849).

366381 is a wasteful number, since it uses less digits than its factorization.

366381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40715 (or 40712 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 366381 is about 605.2941433716. The cubic root of 366381 is about 71.5557131744. Note that the first 3 decimals are identical.

It can be divided in two parts, 366 and 381, that added together give a palindrome (747).

The spelling of 366381 in words is "three hundred sixty-six thousand, three hundred eighty-one".