1142161 has 2 divisors, whose sum is σ = 1142162. Its totient is φ = 1142160.

The previous prime is 1142159. The next prime is 1142171. The reversal of 1142161 is 1612411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 101761 = 1020^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142161 - 2¹ = 1142159 is a prime.

Together with 1142159, it forms a pair of twin primes.

1142161 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1142131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571080 + 571081.

It is an arithmetic number, because the mean of its divisors is an integer number (571081).

2^1142161 is an apocalyptic number.

It is an amenable number.

1142161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142161 is an equidigital number, since it uses as much as digits as its factorization.

1142161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 16.

The square root of 1142161 is about 1068.7193270452. The cubic root of 1142161 is about 104.5303590738.

Adding to 1142161 its reverse (1612411), we get a palindrome (2754572).

The spelling of 1142161 in words is "one million, one hundred forty-two thousand, one hundred sixty-one".