11142885 has 16 divisors (see below), whose sum is σ = 19200384. Its totient is φ = 5485632.

The previous prime is 11142881. The next prime is 11142893. The reversal of 11142885 is 58824111.

11142885 = 91² + 92² + ... + 324².

It is a happy number.

11142885 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11142885 - 2² = 11142881 is a prime.

It is a super-2 number, since 2×11142885² = 248327772246450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28377 + ... + 28766.

It is an arithmetic number, because the mean of its divisors is an integer number (1200024).

Almost surely, 2^11142885 is an apocalyptic number.

11142885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11142885 is a deficient number, since it is larger than the sum of its proper divisors (8057499).

11142885 is a wasteful number, since it uses less digits than its factorization.

11142885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57164.

The product of its digits is 2560, while the sum is 30.

The square root of 11142885 is about 3338.0960141973. The cubic root of 11142885 is about 223.3568191435.

Adding to 11142885 its reverse (58824111), we get a palindrome (69966996).

The spelling of 11142885 in words is "eleven million, one hundred forty-two thousand, eight hundred eighty-five".