1142252280 has 320 divisors, whose sum is σ = 4229850240. Its totient is φ = 274710528.

The previous prime is 1142252183. The next prime is 1142252303. The reversal of 1142252280 is 822522411.

1142252280 is a `hidden beast` number, since 11 + 422 + 5 + 228 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 1979352 + ... + 1979928.

It is an arithmetic number, because the mean of its divisors is an integer number (13218282).

Almost surely, 2^1142252280 is an apocalyptic number.

1142252280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142252280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114925120).

1142252280 is an abundant number, since it is smaller than the sum of its proper divisors (3087597960).

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

1142252280 is a wasteful number, since it uses less digits than its factorization.

1142252280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1142252280 is about 33797.2229628412. Note that the first 3 decimals coincide. The cubic root of 1142252280 is about 1045.3314364242.

Adding to 1142252280 its reverse (822522411), we get a palindrome (1964774691).

The spelling of 1142252280 in words is "one billion, one hundred forty-two million, two hundred fifty-two thousand, two hundred eighty".