1027861 has 4 divisors (see below), whose sum is σ = 1039500. Its totient is φ = 1016224.

The previous prime is 1027853. The next prime is 1027883. The reversal of 1027861 is 1687201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1687201 = 167 ⋅10103.

It can be written as a sum of positive squares in 2 ways, for example, as 649636 + 378225 = 806^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027861 - 2³ = 1027853 is a prime.

It is a Duffinian number.

1027861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5686 + ... + 5863.

It is an arithmetic number, because the mean of its divisors is an integer number (259875).

2^1027861 is an apocalyptic number.

It is an amenable number.

1027861 is a deficient number, since it is larger than the sum of its proper divisors (11639).

1027861 is an equidigital number, since it uses as much as digits as its factorization.

1027861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1027861 is about 1013.8347991660. The cubic root of 1027861 is about 100.9202062312.

The spelling of 1027861 in words is "one million, twenty-seven thousand, eight hundred sixty-one".