1142001 has 12 divisors (see below), whose sum is σ = 1885312. Its totient is φ = 652536.

The previous prime is 1141999. The next prime is 1142003. The reversal of 1142001 is 1002411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1141999) and next prime (1142003).

It is not a de Polignac number, because 1142001 - 2¹ = 1141999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1142003) 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 11 ways as a sum of consecutive naturals, for example, 9001 + ... + 9126.

2^1142001 is an apocalyptic number.

It is an amenable number.

1142001 is a deficient number, since it is larger than the sum of its proper divisors (743311).

1142001 is a wasteful number, since it uses less digits than its factorization.

1142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140 (or 18137 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1142001 is about 1068.6444684740. The cubic root of 1142001 is about 104.5254777893.

Adding to 1142001 its reverse (1002411), we get a palindrome (2144412).

The spelling of 1142001 in words is "one million, one hundred forty-two thousand, one".