343261 has 2 divisors, whose sum is σ = 343262. Its totient is φ = 343260.

The previous prime is 343253. The next prime is 343267. The reversal of 343261 is 162343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244036 + 99225 = 494^2 + 315^2 .

It is an emirp because it is prime and its reverse (162343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343261 - 2³ = 343253 is a prime.

It is a super-2 number, since 2×343261² = 235656228242, which contains 22 as substring.

It is equal to p₂₉₄₄₀ and since 343261 and 29440 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171630 + 171631.

It is an arithmetic number, because the mean of its divisors is an integer number (171631).

2³⁴³²⁶¹ is an apocalyptic number.

It is an amenable number.

343261 is a deficient number, since it is larger than the sum of its proper divisors (1).

343261 is an equidigital number, since it uses as much as digits as its factorization.

343261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 19.

The square root of 343261 is about 585.8848009635. The cubic root of 343261 is about 70.0177506005.

It can be divided in two parts, 3 and 43261, that added together give a square (43264 = 208²).

The spelling of 343261 in words is "three hundred forty-three thousand, two hundred sixty-one".