1020868 has 6 divisors (see below), whose sum is σ = 1786526. Its totient is φ = 510432.

The previous prime is 1020853. The next prime is 1020881. The reversal of 1020868 is 8680201.

It can be written as a sum of positive squares in only one way, i.e., 788544 + 232324 = 888^2 + 482^2 .

It is an unprimeable number.

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, 127605 + ... + 127612.

2^1020868 is an apocalyptic number.

It is an amenable number.

1020868 is a deficient number, since it is larger than the sum of its proper divisors (765658).

1020868 is a wasteful number, since it uses less digits than its factorization.

1020868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255221 (or 255219 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1020868 is about 1010.3801264871. The cubic root of 1020868 is about 100.6908167332.

Subtracting from 1020868 its product of nonzero digits (768), we obtain a square (1020100 = 1010²).

The spelling of 1020868 in words is "one million, twenty thousand, eight hundred sixty-eight".