1142081 has 4 divisors (see below), whose sum is σ = 1144452. Its totient is φ = 1139712.

The previous prime is 1142069. The next prime is 1142083. The reversal of 1142081 is 1802411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1802411 = 13 ⋅138647.

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 341056 = 895^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142081 - 2⁶ = 1142017 is a prime.

It is a super-2 number, since 2×1142081² = 2608698021122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142083) 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, 176 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (286113).

2^1142081 is an apocalyptic number.

It is an amenable number.

1142081 is a deficient number, since it is larger than the sum of its proper divisors (2371).

1142081 is an equidigital number, since it uses as much as digits as its factorization.

1142081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1142081 is about 1068.6818984151. The cubic root of 1142081 is about 104.5279184885.

Adding to 1142081 its reverse (1802411), we get a palindrome (2944492).

The spelling of 1142081 in words is "one million, one hundred forty-two thousand, eighty-one".