1142181 has 20 divisors (see below), whose sum is σ = 1742400. Its totient is φ = 745416.

The previous prime is 1142171. The next prime is 1142191. The reversal of 1142181 is 1812411.

It is an interprime number because it is at equal distance from previous prime (1142171) and next prime (1142191).

It is not a de Polignac number, because 1142181 - 2¹³ = 1133989 is a prime.

It is a super-2 number, since 2×1142181² = 2609154873522, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142131) 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 19 ways as a sum of consecutive naturals, for example, 4660 + ... + 4898.

It is an arithmetic number, because the mean of its divisors is an integer number (87120).

2^1142181 is an apocalyptic number.

It is an amenable number.

1142181 is a deficient number, since it is larger than the sum of its proper divisors (600219).

1142181 is an equidigital number, since it uses as much as digits as its factorization.

1142181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 301 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1142181 is about 1068.7286839980. The cubic root of 1142181 is about 104.5309692023.

Adding to 1142181 its reverse (1812411), we get a palindrome (2954592).

The spelling of 1142181 in words is "one million, one hundred forty-two thousand, one hundred eighty-one".