1023885 has 24 divisors (see below), whose sum is σ = 1808664. Its totient is φ = 535680.

The previous prime is 1023871. The next prime is 1023941. The reversal of 1023885 is 5883201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1764 + 1022121 = 42^2 + 1011^2 .

It is not a de Polignac number, because 1023885 - 2⁶ = 1023821 is a prime.

1023885 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2559 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (75361).

2^1023885 is an apocalyptic number.

1023885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023885 is a deficient number, since it is larger than the sum of its proper divisors (784779).

1023885 is a wasteful number, since it uses less digits than its factorization.

1023885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1023885 is about 1011.8720274817. The cubic root of 1023885 is about 100.7899106493.

The spelling of 1023885 in words is "one million, twenty-three thousand, eight hundred eighty-five".