361291 has 4 divisors (see below), whose sum is σ = 412912. Its totient is φ = 309672.

The previous prime is 361279. The next prime is 361313. The reversal of 361291 is 192163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192163 = 59 ⋅3257.

It is a cyclic number.

It is not a de Polignac number, because 361291 - 2⁹ = 360779 is a prime.

It is an Ulam number.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25800 + ... + 25813.

It is an arithmetic number, because the mean of its divisors is an integer number (103228).

2³⁶¹²⁹¹ is an apocalyptic number.

361291 is a deficient number, since it is larger than the sum of its proper divisors (51621).

361291 is an equidigital number, since it uses as much as digits as its factorization.

361291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51620.

The product of its digits is 324, while the sum is 22.

The square root of 361291 is about 601.0748705444. The cubic root of 361291 is about 71.2228007395. Note that the first 3 decimals are identical.

The spelling of 361291 in words is "three hundred sixty-one thousand, two hundred ninety-one".