1020906 has 24 divisors (see below), whose sum is σ = 2265120. Its totient is φ = 332136.

The previous prime is 1020893. The next prime is 1020907. The reversal of 1020906 is 6090201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1020907) 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 11 ways as a sum of consecutive naturals, for example, 115 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (94380).

2^1020906 is an apocalyptic number.

1020906 is an abundant number, since it is smaller than the sum of its proper divisors (1244214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020906 is a wasteful number, since it uses less digits than its factorization.

1020906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1020906 is about 1010.3989311158. The cubic root of 1020906 is about 100.6920660633.

It can be divided in two parts, 1020 and 906, that multiplied together give a triangular number (924120 = T₁₃₅₉).

The spelling of 1020906 in words is "one million, twenty thousand, nine hundred six".