1142122281 has 32 divisors (see below), whose sum is σ = 1673239680. Its totient is φ = 690393600.

The previous prime is 1142122229. The next prime is 1142122291. The reversal of 1142122281 is 1822212411.

It is a happy number.

It is not a de Polignac number, because 1142122281 - 2⁶ = 1142122217 is a prime.

It is a super-2 number, since 2×1142122281² = 2608886609513285922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142122291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119251 + ... + 128471.

It is an arithmetic number, because the mean of its divisors is an integer number (52288740).

Almost surely, 2^1142122281 is an apocalyptic number.

It is an amenable number.

1142122281 is a deficient number, since it is larger than the sum of its proper divisors (531117399).

1142122281 is a wasteful number, since it uses less digits than its factorization.

1142122281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337.

The product of its digits is 512, while the sum is 24.

The square root of 1142122281 is about 33795.2996879744. The cubic root of 1142122281 is about 1045.2917787528.

Adding to 1142122281 its reverse (1822212411), we get a palindrome (2964334692).

The spelling of 1142122281 in words is "one billion, one hundred forty-two million, one hundred twenty-two thousand, two hundred eighty-one".