1142220520 has 32 divisors (see below), whose sum is σ = 2937139200. Its totient is φ = 391618368.

The previous prime is 1142220509. The next prime is 1142220533. The reversal of 1142220520 is 250222411.

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 7 ways as a sum of consecutive naturals, for example, 2039400 + ... + 2039959.

It is an arithmetic number, because the mean of its divisors is an integer number (91785600).

Almost surely, 2^1142220520 is an apocalyptic number.

1142220520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142220520 is an abundant number, since it is smaller than the sum of its proper divisors (1794918680).

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

1142220520 is a wasteful number, since it uses less digits than its factorization.

1142220520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079377 (or 4079373 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1142220520 is about 33796.7530984857. The cubic root of 1142220520 is about 1045.3217479533.

Adding to 1142220520 its reverse (250222411), we get a palindrome (1392442931).

The spelling of 1142220520 in words is "one billion, one hundred forty-two million, two hundred twenty thousand, five hundred twenty".