855401 has 2 divisors, whose sum is σ = 855402. Its totient is φ = 855400.

The previous prime is 855397. The next prime is 855419. The reversal of 855401 is 104558.

855401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 141376 = 845^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 855401 - 2² = 855397 is a prime.

It is not a weakly prime, because it can be changed into another prime (855431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427700 + 427701.

It is an arithmetic number, because the mean of its divisors is an integer number (427701).

2⁸⁵⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

855401 is a deficient number, since it is larger than the sum of its proper divisors (1).

855401 is an equidigital number, since it uses as much as digits as its factorization.

855401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 855401 is about 924.8789109932. The cubic root of 855401 is about 94.9270353867.

Adding to 855401 its reverse (104558), we get a palindrome (959959).

The spelling of 855401 in words is "eight hundred fifty-five thousand, four hundred one".