1142866 has 4 divisors (see below), whose sum is σ = 1714302. Its totient is φ = 571432.

The previous prime is 1142863. The next prime is 1142881. The reversal of 1142866 is 6682411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6682411 = 17 ⋅393083.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 455625 = 829^2 + 675^2 .

It is a super-2 number, since 2×1142866² = 2612285387912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285715 + ... + 285718.

2^1142866 is an apocalyptic number.

1142866 is a deficient number, since it is larger than the sum of its proper divisors (571436).

1142866 is an equidigital number, since it uses as much as digits as its factorization.

1142866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571435.

The product of its digits is 2304, while the sum is 28.

The square root of 1142866 is about 1069.0491101909. The cubic root of 1142866 is about 104.5518618059.

The spelling of 1142866 in words is "one million, one hundred forty-two thousand, eight hundred sixty-six".