442861 has 2 divisors, whose sum is σ = 442862. Its totient is φ = 442860.

The previous prime is 442843. The next prime is 442879. The reversal of 442861 is 168244.

It is a balanced prime because it is at equal distance from previous prime (442843) and next prime (442879).

It can be written as a sum of positive squares in only one way, i.e., 367236 + 75625 = 606^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 442861 - 2⁵ = 442829 is a prime.

It is a super-2 number, since 2×442861² = 392251730642, which contains 22 as substring.

442861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221430 + 221431.

It is an arithmetic number, because the mean of its divisors is an integer number (221431).

2⁴⁴²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

442861 is a deficient number, since it is larger than the sum of its proper divisors (1).

442861 is an equidigital number, since it uses as much as digits as its factorization.

442861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 442861 is about 665.4780236792. The cubic root of 442861 is about 76.2235454228.

It can be divided in two parts, 4428 and 61, that added together give a square (4489 = 67²).

The spelling of 442861 in words is "four hundred forty-two thousand, eight hundred sixty-one".