1142245988 has 18 divisors (see below), whose sum is σ = 2164523634. Its totient is φ = 527190144.

The previous prime is 1142245961. The next prime is 1142245999. The reversal of 1142245988 is 8895422411.

It can be written as a sum of positive squares in 3 ways, for example, as 90022144 + 1052223844 = 9488^2 + 32438^2 .

It is a super-2 number, since 2×1142245988² = 2609451794204192288, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 844181 + ... + 845532.

It is an arithmetic number, because the mean of its divisors is an integer number (120251313).

Almost surely, 2^1142245988 is an apocalyptic number.

It is an amenable number.

1142245988 is a deficient number, since it is larger than the sum of its proper divisors (1022277646).

1142245988 is a wasteful number, since it uses less digits than its factorization.

1142245988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689743 (or 1689728 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 1142245988 is about 33797.1298781420. The cubic root of 1142245988 is about 1045.3295170475.

The spelling of 1142245988 in words is "one billion, one hundred forty-two million, two hundred forty-five thousand, nine hundred eighty-eight".