1142864 has 10 divisors (see below), whose sum is σ = 2214330. Its totient is φ = 571424.

The previous prime is 1142863. The next prime is 1142881. The reversal of 1142864 is 4682411.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 490000 = 808^2 + 700^2 .

It is a super-2 number, since 2×1142864² = 2612276244992, which contains 22 as substring.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35699 + ... + 35730.

It is an arithmetic number, because the mean of its divisors is an integer number (221433).

2^1142864 is an apocalyptic number.

It is an amenable number.

1142864 is a deficient number, since it is larger than the sum of its proper divisors (1071466).

1142864 is an equidigital number, since it uses as much as digits as its factorization.

1142864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71437 (or 71431 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 1142864 is about 1069.0481747798. The cubic root of 1142864 is about 104.5518008177.

It can be divided in two parts, 11 and 42864, that added together give a cube (42875 = 35³).

The spelling of 1142864 in words is "one million, one hundred forty-two thousand, eight hundred sixty-four".