1011885 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 441408.

The previous prime is 1011827. The next prime is 1011889. The reversal of 1011885 is 5881101.

It is not a de Polignac number, because 1011885 - 2¹⁰ = 1010861 is a prime.

It is a super-2 number, since 2×1011885² = 2047822506450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2206 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1011885 is an apocalyptic number.

1011885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011885 is a deficient number, since it is larger than the sum of its proper divisors (923475).

1011885 is a wasteful number, since it uses less digits than its factorization.

1011885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 320, while the sum is 24.

The square root of 1011885 is about 1005.9249474986. The cubic root of 1011885 is about 100.3946074679.

Adding to 1011885 its reverse (5881101), we get a palindrome (6892986).

The spelling of 1011885 in words is "one million, eleven thousand, eight hundred eighty-five".