356261 has 2 divisors, whose sum is σ = 356262. Its totient is φ = 356260.

The previous prime is 356243. The next prime is 356263. The reversal of 356261 is 162653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244036 + 112225 = 494^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 356261 - 2⁶ = 356197 is a prime.

Together with 356263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178130 + 178131.

It is an arithmetic number, because the mean of its divisors is an integer number (178131).

2³⁵⁶²⁶¹ is an apocalyptic number.

It is an amenable number.

356261 is a deficient number, since it is larger than the sum of its proper divisors (1).

356261 is an equidigital number, since it uses as much as digits as its factorization.

356261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 356261 is about 596.8760340305. The cubic root of 356261 is about 70.8907265714.

The spelling of 356261 in words is "three hundred fifty-six thousand, two hundred sixty-one".