1142399772 has 36 divisors (see below), whose sum is σ = 2936682840. Its totient is φ = 374344992.

The previous prime is 1142399771. The next prime is 1142399777. The reversal of 1142399772 is 2779932411.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142399771) 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 11 ways as a sum of consecutive naturals, for example, 266803 + ... + 271050.

Almost surely, 2^1142399772 is an apocalyptic number.

1142399772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1142399772 is an abundant number, since it is smaller than the sum of its proper divisors (1794283068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1142399772 is a wasteful number, since it uses less digits than its factorization.

1142399772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537922 (or 537917 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1142399772 is about 33799.4049060039. The cubic root of 1142399772 is about 1045.3764268907.

The spelling of 1142399772 in words is "one billion, one hundred forty-two million, three hundred ninety-nine thousand, seven hundred seventy-two".