1142530220 has 48 divisors (see below), whose sum is σ = 2735879328. Its totient is φ = 397040640.

The previous prime is 1142530219. The next prime is 1142530229. The reversal of 1142530220 is 220352411.

It is a super-2 number, since 2×1142530220² = 2610750607226496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1142530192 and 1142530201.

It is not an unprimeable number, because it can be changed into a prime (1142530229) 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 15 ways as a sum of consecutive naturals, for example, 124826 + ... + 133665.

It is an arithmetic number, because the mean of its divisors is an integer number (56997486).

Almost surely, 2^1142530220 is an apocalyptic number.

1142530220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142530220 is an abundant number, since it is smaller than the sum of its proper divisors (1593349108).

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

1142530220 is a wasteful number, since it uses less digits than its factorization.

1142530220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258530 (or 258528 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1142530220 is about 33801.3345890366. The cubic root of 1142530220 is about 1045.4162150855.

Adding to 1142530220 its reverse (220352411), we get a palindrome (1362882631).

The spelling of 1142530220 in words is "one billion, one hundred forty-two million, five hundred thirty thousand, two hundred twenty".