1020869 has 4 divisors (see below), whose sum is σ = 1027296. Its totient is φ = 1014444.

The previous prime is 1020853. The next prime is 1020881. The reversal of 1020869 is 9680201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020869 - 2⁴ = 1020853 is a prime.

It is a super-2 number, since 2×1020869² = 2084347030322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 3294.

It is an arithmetic number, because the mean of its divisors is an integer number (256824).

2^1020869 is an apocalyptic number.

It is an amenable number.

1020869 is a deficient number, since it is larger than the sum of its proper divisors (6427).

1020869 is an equidigital number, since it uses as much as digits as its factorization.

1020869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1020869 is about 1010.3806213502. The cubic root of 1020869 is about 100.6908496107.

The spelling of 1020869 in words is "one million, twenty thousand, eight hundred sixty-nine".