353261 has 4 divisors (see below), whose sum is σ = 354492. Its totient is φ = 352032.

The previous prime is 353237. The next prime is 353263. The reversal of 353261 is 162353.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 162353 = 179 ⋅907.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 198025 = 394^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 353261 - 2¹⁰ = 352237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353263) 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, 71 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (88623).

2³⁵³²⁶¹ is an apocalyptic number.

It is an amenable number.

353261 is a deficient number, since it is larger than the sum of its proper divisors (1231).

353261 is an equidigital number, since it uses as much as digits as its factorization.

353261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its digits is 540, while the sum is 20.

The square root of 353261 is about 594.3576364446. The cubic root of 353261 is about 70.6911800364.

The spelling of 353261 in words is "three hundred fifty-three thousand, two hundred sixty-one".