1023881 has 4 divisors (see below), whose sum is σ = 1026564. Its totient is φ = 1021200.

The previous prime is 1023871. The next prime is 1023941. The reversal of 1023881 is 1883201.

1023881 = 715² + 716².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 511225 + 512656 = 715^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023881 - 2¹⁴ = 1007497 is a prime.

It is a super-2 number, since 2×1023881² = 2096664604322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023821) 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, 650 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (256641).

2^1023881 is an apocalyptic number.

1023881 is the 716-th centered square number.

It is an amenable number.

1023881 is a deficient number, since it is larger than the sum of its proper divisors (2683).

1023881 is an equidigital number, since it uses as much as digits as its factorization.

1023881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1023881 is about 1011.8700509453. The cubic root of 1023881 is about 100.7897793975.

The spelling of 1023881 in words is "one million, twenty-three thousand, eight hundred eighty-one".