1142885 has 4 divisors (see below), whose sum is σ = 1371468. Its totient is φ = 914304.

The previous prime is 1142881. The next prime is 1142891. The reversal of 1142885 is 5882411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5882411 = 23 ⋅255757.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 954529 = 434^2 + 977^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142885 - 2² = 1142881 is a prime.

It is a super-2 number, since 2×1142885² = 2612372246450, 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 (1142881) 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, 114284 + ... + 114293.

It is an arithmetic number, because the mean of its divisors is an integer number (342867).

2^1142885 is an apocalyptic number.

It is an amenable number.

1142885 is a deficient number, since it is larger than the sum of its proper divisors (228583).

1142885 is an equidigital number, since it uses as much as digits as its factorization.

1142885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228582.

The product of its digits is 2560, while the sum is 29.

The square root of 1142885 is about 1069.0579965558. The cubic root of 1142885 is about 104.5524411897.

The spelling of 1142885 in words is "one million, one hundred forty-two thousand, eight hundred eighty-five".