1021801 has 8 divisors (see below), whose sum is σ = 1173600. Its totient is φ = 879840.

The previous prime is 1021799. The next prime is 1021807. The reversal of 1021801 is 1081201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021801 - 2¹ = 1021799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021807) 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 7 ways as a sum of consecutive naturals, for example, 2236 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (146700).

2^1021801 is an apocalyptic number.

1021801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021801 is a deficient number, since it is larger than the sum of its proper divisors (151799).

1021801 is a wasteful number, since it uses less digits than its factorization.

1021801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1021801 is about 1010.8417284620. The cubic root of 1021801 is about 100.7214821170.

The spelling of 1021801 in words is "one million, twenty-one thousand, eight hundred one".