855061 has 2 divisors, whose sum is σ = 855062. Its totient is φ = 855060.

The previous prime is 855059. The next prime is 855067. The reversal of 855061 is 160558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820836 + 34225 = 906^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 855061 - 2¹ = 855059 is a prime.

It is a super-2 number, since 2×855061² = 1462258627442, which contains 22 as substring.

Together with 855059, it forms a pair of twin primes.

855061 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427530 + 427531.

It is an arithmetic number, because the mean of its divisors is an integer number (427531).

2⁸⁵⁵⁰⁶¹ is an apocalyptic number.

It is an amenable number.

855061 is a deficient number, since it is larger than the sum of its proper divisors (1).

855061 is an equidigital number, since it uses as much as digits as its factorization.

855061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 855061 is about 924.6950848793. The cubic root of 855061 is about 94.9144566978.

The spelling of 855061 in words is "eight hundred fifty-five thousand, sixty-one".