855461 has 2 divisors, whose sum is σ = 855462. Its totient is φ = 855460.

The previous prime is 855431. The next prime is 855467. The reversal of 855461 is 164558.

It is a happy number.

855461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 231361 = 790^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 855461 - 2⁶ = 855397 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427730 + 427731.

It is an arithmetic number, because the mean of its divisors is an integer number (427731).

2⁸⁵⁵⁴⁶¹ is an apocalyptic number.

It is an amenable number.

855461 is a deficient number, since it is larger than the sum of its proper divisors (1).

855461 is an equidigital number, since it uses as much as digits as its factorization.

855461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 855461 is about 924.9113471031. The cubic root of 855461 is about 94.9292548093.

The spelling of 855461 in words is "eight hundred fifty-five thousand, four hundred sixty-one".